niryuu/sni-each-converted huggingface dataset:
Most sectors of GA for which data are available have experienced growth in aircraft numbers and hours flown over the last two decades . The lighter end of the GA spectrum : microlights , amateur built , and airships and balloons , have in particular shown strong growth , although the last of these activities was severely curtailed during the foot @-@ and @-@ mouth outbreak in 2001 , when access to farmland was denied . After strong growth in the late 1980s , traditional flying has shown a slight decline recently , reflecting a move amongst recreational flyers towards microlight aircraft , and increased numbers of foreign @-@ registered aircraft . Recreational helicopter usage has grown primarily due to the introduction of smaller and cheaper aircraft . Glider activity has remained relatively static , although there has been a gradual increase in the number of self @-@ launching motor gliders .Business aviation has shown strong growth , although the numbers of aircraft on the UK register have declined . This reflects a shift away from turboprop aircraft towards foreign @-@ registered business jets based in the UK , which are estimated to be growing in numbers . However , twin piston @-@ engined aircraft numbers have declined significantly , reflecting pressures on the light air @-@ taxi segment from increasingly flexible and cheaper scheduled services , and a more sophisticated corporate charter business . The amount of flight training conducted by UK schools has declined , largely at the hands of competition from foreign schools , which benefit from lower costs and better weather  Since 1990 the total number of hours flown annually by the GA sector has remained in the range 1 @.@ 25 – 1 @.@ 35 million , the dominant sector being traditional GA flying , which accounts for 0 @.@ 6 million per year . An overall increase in aircraft numbers combined with nil growth in hours flown has brought the annual average utilisation per aircraft down from 157 hours in 1984 to 103 hours in 2002 . The decline in asset utilisation has led to speculation that the economic health of the GA industry is weakening , though the lack of data on profitability makes this difficult to confirm .fill in the blank  : Most sectors of __________________ for which data are available have experienced growth in aircraft numbers and hours flown over the last two decades . 
Output:  GA
The objective of regulation is to  promote high standards of safety in all aspects of aviation , and this is the main area of interaction between the CAA and the GA sector . Efforts focus on assuring appropriate standards of airworthiness , pilot qualification , the rules for the movement of aircraft , and equipment to be carried . The CAA was established as the primary regulatory body for all aviation in the UK in 1972 . In 1991 it started working within the Joint Aviation Authorities ( JAA ) framework to implement agreed common standards , known as the Joint Aviation Requirements ( JAR ) , throughout the European Union ( EU ) . In 2003 this was taken a step further when the European Aviation Safety Agency ( EASA ) was established as the central EU regulator , taking over responsibility for legislating airworthiness and environmental regulation from the national authorities . The CAA acts as an agency of EASA on these issues , retaining its original regulatory powers in areas not yet transferred to EASA . Proposed developments seek to establish EASA as the single authority throughout the EU , taking over from individual member states the power to regulate all aviation other than that specifically excluded from the scope of EASA . fill in the blank  : The objective of regulation is to  promote high __________________ of safety in all aspects of aviation  , and this is the main area of interaction between the CAA and the GA sector . 
Output:  standards
Within this framework certain sectors of GA are governed on a devolved basis . In all cases the CAA / EASA retains responsibility for safety regulation , but representative bodies , particularly of sectors that are not included in the scope of EASA , are granted greater oversight of their activities . The majority of microlight aircraft are regulated by the British Microlight Aircraft Association ( BMAA ) , although a significant number are regulated by the Light Aircraft Association ( LAA ) , formerly known as the Popular Flying Association . The LAA is the primary regulator for amateur built aircraft , as well as vintage and classic aircraft . Parachuting is governed by the British Parachute Association , although the aircraft used in this activity are generally CAA @-@ regulated . Balloon and airship flying is overseen by the British Balloon and Airship Club . The UK @-@ specific National Private Pilot Licence ( NPPL ) is administered by the National Pilots Licensing Group Ltd . , supported by the LAA , the Aircraft Owners and Pilots Association UK , the British Gliding Association , and the British Microlight Aircraft Association . Separate from these devolved groups , gliding in the UK is self @-@ regulated . The British Gliding Association was until recently responsible for glider airworthiness , now formally regulated as a result of EASA legislation , and still retains control of pilot certification . Hang gliding and paragliding activities ( i.e. foot @-@ launched gliders ) are governed by the British Hang Gliding and Paragliding Association . fill in the blank  : Within this framework certain sectors of __________________ are governed on a devolved basis . 
Output:  GA
Under CAA and EASA rules , all aircraft are required to meet certain standards of airworthiness to fly safely and legally . Aircraft that meet these standards are issued with a Certificate of Airworthiness . However , British @-@ registered aircraft which are excluded from the scope of EASA , and which cannot satisfy the requirements for the issue of a Certificate of Airworthiness , may be issued with a Permit to Fly . This allows them to fly in UK airspace subject to certain limitations , for example being restricted to day @-@ time flights under visual flight rules only . A number of organisations ( e.g. the British Microlight Aircraft Association and the Light Aircraft Association ) have obtained a standing over @-@ flight permission for Permit to Fly aircraft within their area of interest with some European countries , notably France . Permits are typically issued to vintage and historic aircraft , amateur built aircraft , and microlights . fill in the blank  : Under CAA and EASA rules , all aircraft are required to meet __________________ standards of airworthiness to fly safely and legally . 
Output:  certain
The pilot qualification most relevant to GA is the Private Pilot Licence ( PPL ) , which permits the holder to fly for recreational purposes without remuneration . In addition to the European @-@ wide Joint Aviation Regulations Flight Crew Licensing ( JAR @-@ FCL ) standard , the CAA also issues UK @-@ specific national licences . In the absence of European standards for gyroplane , balloon , and airship pilots , the CAA licenses these according to the original UK PPL standard . As a response to the perception that JAR pilot licensing standards are excessively bureaucratic and expensive for the purposes of recreational pilots , the National Private Pilot Licence ( NPPL ) was introduced in 2002 . The NPPL is easier to obtain than the JAR @-@ FCL licence , has less stringent medical requirements , is more restrictive in the privileges it grants , and is valid only for flights in British @-@ registered aircraft flying in UK and French airspace . Although there are plans to bring glider pilot licensing within the regulatory framework of EASA , the gliding sector is currently self @-@ regulating in this respect . The British Gliding Association is responsible for defining the standards of initial training , and certifying , via a badge system , pilots who meet those standards . Pilots working in sectors of GA that are commercial operations , such as aerial work and business aviation , are required to hold a professional pilot licence which , at a minimum , is the Commercial Pilot Licence . fill in the blank  : The pilot qualification most __________________ to GA is the Private Pilot Licence ( PPL ) , which permits the holder to fly for recreational purposes without remuneration . 
Output:  relevant
Between 1995 and 2004 there were 2 @,@ 630 accidents involving GA aircraft , of which 139 were fatal , resulting in the loss of 317 lives . The majority of accidents involved small fixed @-@ wing aircraft engaged in private flights , and analysis attributes the most common causes of these to : flight handling skills ; poor judgement or airmanship ; lack of training or experience ; and omission of , or inappropriate , action . There were 27 fatal accidents involving GA aircraft in 2007 , resulting in the loss of 48 lives . These compare with 16 accidents claiming a total of 19 lives the previous year , and although the 2007 statistics are higher than average , they are not exceptional . fill in the blank  : Between 1995 and 2004 there were 2 @,@ __________________ accidents involving GA aircraft , of which 139 were fatal , resulting in the loss of 317 lives . 
Output:  630
The growth in Commercial Air Transport ( CAT ) has eroded the operational freedom of GA , both in the air and on the ground at larger airports . Difficulty with access to larger airports is compounded by a decline in the number of aerodromes generally , and existing sites are often threatened with closure and re @-@ development for more profitable uses . The UK planning system is designed to focus on local issues , and consideration of the national impact of GA operations is not within its remit . This makes aerodrome development difficult , often subjecting those that successfully negotiate the process to restrictions in use . fill in the blank  : The growth in Commercial Air __________________ ( CAT ) has eroded the operational freedom of GA , both in the air and on the ground at larger airports . 
Output:  Transport
Airspace is shared by CAT , military and GA users . It is divided into controlled airspace , in which aircraft must always be under the control of an air traffic controller , and uncontrolled airspace , in which aircraft can operate autonomously . Although GA flights can under certain conditions enter controlled airspace , they operate mainly outside of it . Controlled airspace is essential for the provision of a known air traffic environment necessary for the safe operation of CAT . A CAA review found that  mixing [ commercial ] operations with other users is considered undesirable , even untenable by commercial operators . However this position has resulted in extensive Class A controlled airspace with complex boundaries , including some running down to the ground , prohibiting VFR access to airspace , resulting in high numbers of GA flights operating close to the borders of controlled airspace who could not get formal receipt of an air traffic service . Coupled with pilot navigation errors , hundreds of airspace infringements have been recorded every year . Increases in the number of CAT operations , and in the number of airports they operate from , has resulted in a corresponding increase in Class A controlled airspace . Between 1997 and 2006 this area grew in size from 13 per cent of all airspace to 22 per cent nationally , and from 24 per cent to 43 per cent in airspace above England and Wales , leading to a perception within the GA community of being squeezed out . There are particular problems for GA around large airports , where Class A controlled airspace extends to ground level . The concentration of commercial operations and high demand for GA in the South East of England have also resulted in extensive areas of Class A controlled airspace there , which serve to channel uncontrolled GA operations through high @-@ collision @-@ risk hot spots . fill in the blank  : Airspace is shared by CAT , military and __________________ users . 
Output:  GA
Regional airports , such as Edinburgh Airport , have experienced strong growth in CAT operations in recent years . These operations are commercially and operationally incompatible with GA , and although there is no evidence of deliberate discrimination , the effect has been to discourage or exclude it . GA aircraft are being subject to significant increases in charges , including the imposition of handling fees in some cases . Some airports restrict or deny GA parking , and others limit or refuse certain GA activity . As a result , light GA aircraft are now rarely or never seen at large , busy international airports such as Heathrow , Stansted , Gatwick and Manchester . In addition to this de facto loss of facilities , the number of aerodromes in the UK has been in decline over the last 50 years , as a result of increasing urbanisation and the closure of airfields built during WWII . Alternative and more profitable uses for land can also lead to existing aerodromes being threatened with closure , for example North Weald , or actually being closed , as happened to Ipswich Airport. and Bristol Filton Airport . Referring to the importance of a functioning national network of GA airfields  , especially where GA performs an air transport role , the CAA states that  there could be cause for concern if a significant further loss of airfields were to continue , especially if crucial nodes on the transport network were to be lost .  fill in the blank  : Regional airports , such as Edinburgh Airport , have experienced strong growth in CAT __________________ in recent years . 
Output:  operations
The planning system is critical to the viability and operation of GA aerodromes . With many cities lacking scheduled air transport services between them , and with GA access to commercial airports becoming increasingly difficult and expensive , a viable network of aerodromes supporting GA air transport operations is regarded as an important national issue . However , there is no unified national planning policy specific to GA aerodromes , and planning decisions relating to these are based on local issues that are not required to consider the national impact . Because aircraft are excluded from noise control legislation , the only recourse for people affected by aircraft noise is through the planning process , and this issue is the principal factor on which the majority of planning decisions relating to GA land use are made . GA is a specialist subject often unfamiliar to Local Planning Authorities , and most planning decisions relating to GA either refuse permission , or grant it with restrictive conditions . Little Gransden is just one example of a GA airfield required to comply with planning restrictions on the number of movements permitted , thereby inhibiting further development . Such restrictions , if poorly conceived , can make GA operations unviable or even unsafe . fill in the blank  : The planning system is __________________ to the viability and operation of GA aerodromes . 
Output:  critical
Zrínyi was built at the Stabilimento Tecnico Triestino dockyard in Trieste , the same place where her sister ships were built earlier . She was laid down on 15 November 1908 and launched from the slipway on 12 April 1910 . The teak used on Zrínyi 's deck was the only material Austria @-@ Hungary had to purchase abroad to build the ship . The ship was completed by 15 July 1911 , and on 22 November 1911 she was commissioned into the fleet . She was the last ship of the class to be completed and had a crew of 880 to 890 officers and men . Zrínyi was 138 @.@ 8 m ( 455 ft 4 in ) long , and had a beam of 24 @.@ 6 m ( 80 ft 8 in ) and a draft of 8 @.@ 1 m ( 26 ft 9 in ) . She displaced 14 @,@ 508 long tons ( 14 @,@ 741 t ) normally , and up to 15 @,@ 845 long tons ( 16 @,@ 099 t ) with a full combat load . She was powered by two @-@ shaft four @-@ cylinder vertical triple expansion engines rated at 19 @,@ 800 indicated horsepower . The ship had a top speed of 20 @.@ 5 knots ( 38 @.@ 0 km / h ; 23 @.@ 6 mph ) . Zrínyi was the first warship in the Austro @-@ Hungarian Navy to use fuel oil to supplement her 12 Yarrow @-@ type coal @-@ fired boilers . She had a maximum range of 4 @,@ 000 nautical miles ( 7 @,@ 400 km ; 4 @,@ 600 mi ) at a cruising speed of 10 knots ( 19 km / h ; 12 mph ) . The ship 's primary armament consisted of four 30 @.@ 5 cm ( 12 in ) 45 @-@ caliber guns in two twin gun turrets . This was augmented by a heavy secondary battery of eight 24 cm ( 9 @.@ 4 in ) guns in four wing turrets . The tertiary battery consisted of twenty 10 cm L / 50 guns in casemated single mounts , four 47 mm ( 1 @.@ 85 in ) L / 44 and one 47 mm L / 33 quick @-@ firing guns . Furthermore , the ship 's boats were equipped with two 66 mm ( 2 @.@ 6 in ) landing guns for operations shore . Three 45 cm ( 17 @.@ 7 in ) torpedo tubes were also carried , one on each broadside and one in the stern . fill in the blank  : Zrínyi was __________________ at the Stabilimento Tecnico Triestino dockyard in Trieste , the same place where her sister ships were __________________ earlier . 
Output:  built
The ship was assigned to the Austro @-@ Hungarian Fleet 's 1st Battle Squadron after her 1911 commissioning . In 1912 , Zrínyi and her two sister ships conducted two training cruises into the eastern Mediterranean Sea . On the second cruise into the Aegean Sea , conducted from November to December , Zrínyi and her sister ships were accompanied by the cruiser SMS Admiral Spaun and a pair of destroyers . After returning to Pola , the entire fleet mobilized for possible hostilities , as tensions flared in the Balkans . In 1913 , Zrínyi participated in an international naval demonstration in the Ionian Sea to protest the Balkan Wars . Ships from other navies included in the demonstration were the British pre @-@ dreadnought HMS King Edward VII , the Italian pre @-@ dreadnought Ammiraglio di Saint Bon , the French armored cruiser Edgar Quinet , and the German light cruiser SMS Breslau . The most important action of the combined flotilla , which was under the command of British Admiral Cecil Burney , was to blockade the Montenegrin coast . The goal of the blockade was to prevent Serbian reinforcements from supporting the siege at Scutari , where Montenegro had besieged a combined force of Albanians and Ottomans . Pressured by the international blockade , Serbia withdrew its army from Scutari , which was subsequently occupied by a joint Allied ground force . During that year , the first of four new dreadnoughts , SMS Viribus Unitis , that made up the Tegetthoff class — the only dreadnoughts built for the Austro @-@ Hungarian Navy — came into active service . With the commissioning of these dreadnoughts , Zrínyi and her sisters were moved from the 1st Division to the 2nd Division of the 1st Battle Squadron . fill in the blank  : The __________________ was assigned to the Austro @-@ Hungarian Fleet 's 1st Battle Squadron after her 1911 commissioning . 
Output:  ship
The fungus was first described scientifically in 1805 by Johannes Baptista von Albertini and Lewis David de Schweinitz as Peziza carbonaria . Mordecai Cubitt Cooke illustrated the fruitbodies , spores , and asci in his 1879 work Mycographia , seu Icones fungorum . Figures of fungi from all parts of the world . In 1889 , Pier Andrea Saccardo transferred the fungus to the genus Geopyxis , giving the species its current name . Pustularia carbonaria , published by Heinrich Rehm in 1884 , is a synonym of G. carbonaria . Louis @-@ Joseph Grélet proposed the variety Geopyxis carbonaria var. sessilis in 1937 , referring to forms producing fruitbodies without a stalk , but the taxon is not considered to have independent taxonomic significance . In 1860 Miles Berkeley and Moses Ashley Curtis described the species Peziza lepida from collections made in Japan as part of the North Pacific Exploring and Surveying Expedition ( 1853 – 1856 ) . This taxon was synonymized with G. carbonaria by Mien Rifai in 1968 , a taxonomic opinion corroborated by Donald Pfister about a decade later .The specific epithet carbonaria derives from the Latin word for charcoal  . Common names given to the fungus include  charcoal loving elf @-@ cup  , dwarf acorn cup  , pixie cup , and the British Mycological Society approved  stalked bonfire cup  .fill in the blank  : The fungus was first described scientifically in 1805 by __________________ Baptista von Albertini and Lewis David de Schweinitz as Peziza carbonaria . 
Output:  Johannes
The fruitbodies ( ascocarps ) of Geopyxis carbonaris are cup shaped , 1 – 2 cm wide , and have fringed whitish margins . The inner spore @-@ bearing surface of the cup , the hymenium , is brick red and smooth , while the exterior surface is a dull yellow , and may be either smooth or have blister @-@ like spots ( pustules ) . The stipe is small ( 1 – 1 @.@ 5 mm long and 1 – 2 mm wide ) , whitish in color , and expands abruptly into the cup . The brownish flesh of the fungus is thin and brittle . It does not have any distinctive taste , but has an unpleasant smell when crushed in water . The edibility of the fungus is not known , but the fruitbodies are insubstantial and unlikely to be harvested for eating .fill in the blank  : The fruitbodies ( ascocarps ) of Geopyxis carbonaris are cup shaped , 1 – __________________ cm wide , and have fringed whitish margins . 
Output:  2
In mass , the spores are whitish . The spores are elliptical , smooth , hyaline , devoid of oil droplets ( eguttulate ) , and have dimensions of 13 – 18 by 7 – 9 µm . They are thin walled and germinate and grow rapidly in vitro in the absence of external stimuli . The asci are 190 – 225 by 9 – 10 µm . The paraphyses are slightly club @-@ shaped , unbranched , and have irregular orange @-@ brown granules , with tips up to 5 µm wide , and are not forked or lobed . The hypothecium , the layer of cells below the hymenium , is made of densely packed , small irregular cells . fill in the blank  : In __________________ , the spores are whitish . 
Output:  mass
The closely related vulcan elf cup ( Geopyxis vulcanalis ) has a pale orange to yellowish fruitbody that is deeply cup shaped before flattening in maturity , and its crushed flesh often has an odor of sulfur . It may be distinguished microscopically by its paraphyses , which lack the orange @-@ brown granules characteristic of G. carbonaria . It also has larger spores , measuring 14 – 22 by 8 – 11 µm . Unlike G. carbonaria , it grows on substrates other than burned wood , including mosses , and needle duff . Tarzetta cupularis , which grows habitats similar to G. carbonaria , is distinguished microscopically by its spores that contain two oil droplets . Other genera with similar species with which G. carbonaria may be confused in the field include Aleuria , Caloscypha , Melastiza , and Sowerbyella .fill in the blank  : The closely related vulcan elf cup ( Geopyxis __________________ ) has a pale orange to yellowish fruitbody that is deeply cup shaped before flattening in maturity , and its crushed flesh often has an odor of sulfur . 
Output:  vulcanalis
Geopyxis carbonaria is widespread on burned soil or charcoal in the spring and throughout the growing season . It is one of the most common pioneer species found on burned ground . The charred litter on the forest floor increases the underlying soil pH as well as the availability of minerals . Fruitbodies are produced from 16 to 139 weeks after a forest fire in areas with coniferous trees . Most fruitbodies are produced in the first year after a burn . The fungus prefers fruiting in microhabitats with thin postfire duff near standing burned tree trunks . Geopyxis carbonaria fruitbodies are often found in the same post @-@ fire stands as morels , although the former is usually more abundant . Because the pixie cup fruits earlier than morels , it may serve as an indicator of imminent morel fruiting . Other cup fungi often found fruiting in the same area as G. carbonaria include those from the genera Aleuria , Anthracobia , Peziza , and Tarzetta . The fungus is found in Europe ( from where it was originally described ) , and is widespread throughout North America . The North American distribution extends north to Alaska . In 2010 , it was reported for the first time from Turkey . fill in the blank  :  Geopyxis __________________ is widespread on burned soil or charcoal in the spring and throughout the growing season . 
Output:  carbonaria
In proposing his plan for a mint and a coinage system , Secretary of the Treasury Alexander Hamilton in 1791 proposed that the one @-@ dollar denomination be struck both as a gold coin , and as one of silver , representative of the two metals which he proposed be made legal tender . Congress followed Hamilton 's recommendation only in part , authorizing a silver dollar , but no coin of that denomination in gold . In 1831 , the first gold dollar was minted , at the private mint of Christopher Bechtler in North Carolina . Much of the gold then being produced in the United States came from the mountains of North Carolina and Georgia , and the dollars and other small gold coins issued by Bechtler circulated through that region , and were now and then seen further away . Additional one @-@ dollar pieces were struck by August Bechtler , Christopher 's son . Soon after the Bechtlers began to strike their private issues , Secretary of the Treasury Levi Woodbury became an advocate of having the Mint of the United States ( Mint  , when described as an institution ) strike the one @-@ dollar denomination in gold . He was opposed by the Mint Director , Robert M. Patterson . Woodbury persuaded President Andrew Jackson to have pattern coins struck . In response , Patterson had Mint Second Engraver Christian Gobrecht break off work on the new design for the silver one @-@ dollar coin and work on a pattern for the gold dollar . Gobrecht 's design featured a Liberty cap surrounded by rays on one side , and a palm branch arranged in a circle with the denomination , date , and name of the country on the other . Consideration was given to including the gold dollar as an authorized denomination in the revisionary legislation that became the Mint Act of 1837 . The Philadelphia newspaper Public Ledger , in December 1836 , supported a gold dollar , stating that the dollar is the smallest gold coin that would be convenient , and as it would be eminently so , neither silver nor paper should be allowed to take its place . Nevertheless , after Mint Director Patterson appeared before a congressional committee , the provision authorizing the gold dollar was deleted from the bill . fill in the blank  : In proposing his plan for a mint and a coinage system , Secretary of the Treasury Alexander Hamilton in 1791 proposed that the one @-@ dollar denomination be struck both as a __________________ coin , and as one of silver , representative of the two metals which he proposed be made legal tender . 
Output:  gold
The officers at the Philadelphia Mint , including Chief Coiner Franklin Peale , were mostly the friends and relations of Director Patterson . The outsider in their midst was Chief Engraver James B. Longacre , successor to Gobrecht ( who had died in 1844 ) . A former copper @-@ plate engraver , Longacre had been appointed through the political influence of South Carolina Senator John C. Calhoun . When Longacre began work on the two new coins in early 1849 , he had no one to assist him . Longacre wrote the following year that he had been warned by a Mint employee that one of the officers ( undoubtedly Peale ) planned to undermine the chief engraver 's position by having the work of preparing designs and dies done outside Mint premises . Accordingly , when the gold coin bill became law , Longacre apprised Patterson that he was ready to begin work on the gold dollar . The Mint Director agreed , and after viewing a model of the head on the obverse , authorized Longacre to proceed with preparation of dies . According to Longacre , The engraving was unusually minute and required very close and incessant labor for several weeks . I made the original dies and hubs for making the working dies twice over , to secure their perfect adaptation to the coining machinery . I had a wish to execute this work single handed , that I might thus silently reply to those who had questioned my ability for the work . The result , I believe , was satisfactory .  fill in the blank  :   The officers at the Philadelphia __________________ , including Chief Coiner Franklin Peale , were mostly the friends and relations of Director Patterson . 
Output:  Mint
The Type 1 gold dollar depicts a head of Liberty , facing left , with a coronet or tiara on her head bearing her name . Her hair is gathered in a bun ; she is surrounded by 13 stars representing the original states . The reverse features the date and denomination within a wreath , with the name of the nation near the rim . Contemporary reviews of the Type 1 design were generally favorable . The New York Weekly Tribune on May 19 , 1849 described the new dollar as  undoubtedly the neatest , tiniest , lightest , coin in this country ... it is too delicate and beautiful to pay out for potatoes , and sauerkraut , and salt pork . Oberon might have paid Puck with it for bringing the blossom which bewitched Titania .  Willis ' Bank Note List stated that  there is no probability of them ever getting into general circulation ; they are altogether too small .  The North Carolina Standard hoped that they would be struck at the Charlotte Mint and circulated locally to eliminate the problem of small @-@ denomination bank notes from out of state . Coin dealer and numismatic author Q. David Bowers notes that the head of Liberty on the Type 1 dollar is a scaled @-@ down version of that on the double eagle , and  a nicely preserved gold dollar is beautiful to behold  . fill in the blank  : The Type 1 gold dollar depicts a head of Liberty , facing __________________ , with a coronet or tiara on her head bearing her name . 
Output:  left
Mint records indicate the first gold dollars were produced on May 7 , 1849 ; Longacre 's diary notes state instead that the first were struck on May 8 . A few coins in proof condition were struck on the first day , along with about 1 @,@ 000 for circulation . There are five major varieties of the 1849 gold dollar from Philadelphia , made as Longacre continued to fine @-@ tune the design . Mintmarked dies were sent by Longacre 's Engraving Department at the Philadelphia Mint to the branch mints at Charlotte , Dahlonega ( in Georgia ) , and New Orleans ; coins struck at the branches resemble some of the types issued from Philadelphia , depending on when the dies were produced . Of the coins struck at the branch mints in 1849 , only pieces struck at Charlotte ( 1849 @-@ C ) exist in multiple varieties ; most are of what is dubbed the  Closed Wreath  variety . Approximately five of the 1849 @-@ C Open Wreath are known ; one , believed the finest surviving specimen , sold at auction for $ 690 @,@ 000 in 2004 , remaining a record for the gold dollar series as of 2013 . One of the changes made during production was the inclusion of Longacre 's initial  L on the truncation of Liberty 's neck , the first time a U.S. coin intended for full @-@ scale production had borne the initial of its designer . All issues beginning in 1850 bear the Closed Wreath . fill in the blank  : Mint records indicate the first gold dollars were produced on May __________________ , 1849 ; Longacre 's diary notes state instead that the first were struck on May 8 . 
Output:  7
The Type 2 and 3 gold dollars depict Liberty as a Native American princess , with a fanciful feathered headdress not resembling any worn by any Indian tribe . This image is an inexact copy of the design Longacre had made for the three @-@ dollar piece , and is one of a number of versions of Liberty Longacre created based on the Venus Accroupie or Crouching Venus , a sculpture then on display in a Philadelphia museum . For the reverse , Longacre adapted the  agricultural wreath  he had created for the reverse of the three @-@ dollar piece , composed of cotton , corn , tobacco , and wheat , blending the produce of North and South . This wreath would appear , later in the 1850s , on the Flying Eagle cent . Art historian Cornelius Vermeule deprecated the Indian princess design used by Longacre for the obverses of the Types 2 and 3 gold dollar , and for the three @-@ dollar piece ,  the ' princess ' of the gold coins is a banknote engraver 's elegant version of folk art of the 1850s . The plumes or feathers are more like the crest of the Prince of Wales than anything that saw the Western frontiers , save perhaps on a music hall beauty .  fill in the blank  : The Type 2 and 3 gold dollars depict Liberty as a __________________ American princess , with a fanciful feathered headdress not resembling any worn by any Indian tribe . 
Output:  Native
The gold dollar continued to be produced in the late 1850s , though mintages declined from the figures of two million or more each year between 1850 and 1854 . Only about 51 @,@ 000 gold dollars were produced in 1860 , with over two @-@ thirds of that figure at Philadelphia , just under a third at San Francisco , and 1 @,@ 566 at Dahlonega . Roughly a hundred are known of the last , creating one of the great rarities from Dahlonega in the series . The other candidate for the rarest from that mint is the 1861 @-@ D , with an estimated mintage of 1 @,@ 000 and perhaps 45 to 60 known . Two pairs of dies were shipped from Philadelphia to Dahlonega on December 10 , 1860 ; they arrived on January 7 , 1861 , two weeks before Georgia voted to secede from the Union , as the American Civil War began . Under orders from Governor Joseph E. Brown , state militia secured the mint , and at some point , small quantities of dollars and half eagles were produced . Records of how many coins were struck and when have not survived . Since dies crack in time , and all the mints were supplied with them from Philadelphia , coining could not last , and in May 1861 , coins and supplies remaining at Dahlonega were turned over to the treasury of the Confederate States of America , which Georgia had by then joined . Gold coins with a face value of $ 6 were put aside for assay . Normally , they would have been sent to Philadelphia to await the following year 's meeting of the United States Assay Commission , when they would be available for testing . Instead , these were sent to the initial Confederate capital of Montgomery , Alabama , though what was done with them there , and their ultimate fate , are unknown . The rarity of the 1861 @-@ D dollar , and the association with the Confederacy , make it especially prized . Dahlonega , like the other two branch mints in the South , closed its doors after the 1861 strikings . It and the Charlotte facility never reopened ; the New Orleans Mint again struck coins from 1879 to 1909 , but did not strike gold dollars again . After 1861 , the only issuance of gold dollars outside Philadelphia was at San Francisco , in 1870 . The outbreak of the Civil War shook public confidence in the Union , and citizens began hoarding specie , gold and silver coins . In late December 1861 , banks and then the federal Treasury stopped paying out gold at face value . By mid @-@ 1862 , all federal coins , even the base metal cent , had vanished from commerce in much of the country . The exception was the Far West , where for the most part , only gold and silver were acceptable currencies , and paper money traded at a discount . In the rest of the nation , gold and silver coins could be purchased from banks , exchange agents , and from the Treasury for a premium in the new greenbacks the government began to issue to fill the gap in commerce and finance the war . fill in the blank  :  The gold dollar continued to be produced in the late __________________s , though mintages declined from the figures of two million or more each year between __________________ and 1854 . 
Output:  1850
The gold dollar had a brief resurrection during the period of Early United States commemorative coins . Between 1903 and 1922 nine different issues were produced , with a total mintage of 99 @,@ 799 . These were minted for various public events , did not circulate , and none used Longacre 's design . Johnson – Corey – Chaykovsky reaction  The Johnson – Corey – Chaykovsky reaction ( sometimes referred to as the Corey – Chaykovsky reaction or CCR ) is a chemical reaction used in organic chemistry for the synthesis of epoxides , aziridines , and cyclopropanes . It was discovered in 1961 by A. William Johnson and developed significantly by E. J. Corey and Michael Chaykovsky . The reaction involves addition of a sulfur ylide to a ketone , aldehyde , imine , or enone to produce the corresponding 3 @-@ membered ring . The reaction is diastereoselective favoring trans substitution in the product regardless of the initial stereochemistry . The synthesis of epoxides via this method serves as an important retrosynthetic alternative to the traditional epoxidation reactions of olefins . The reaction is most often employed for epoxidation via methylene transfer , and to this end has been used in several notable total syntheses ( See Synthesis of epoxides below ) . Additionally detailed below are the history , mechanism , scope , and enantioselective variants of the reaction . Several reviews have been published . fill in the blank  : The gold dollar had a brief resurrection during the period of Early United States commemorative __________________ . 
Output:  coins
The original publication by Johnson concerned the reaction of 9 @-@ dimethylsulfonium fluorenylide with substituted benzaldehyde derivatives . The attempted Wittig @-@ like reaction failed and a benzalfluorene oxide was obtained instead , noting that  Reaction between the sulfur ylid and benzaldehydes did not afford benzalfluorenes as had the phosphorus and arsenic ylids .  The subsequent development of ( dimethyloxosulfaniumyl ) methanide , ( CH3 ) 2SOCH2 and ( dimethylsulfaniumyl ) methanide , ( CH3 ) 2SCH2 ( known as Corey – Chaykovsky reagents ) by Corey and Chaykovsky as efficient methylene @-@ transfer reagents established the reaction as a part of the organic canon . fill in the blank  :  The original publication by Johnson concerned the reaction of 9 @-@ __________________ fluorenylide with substituted benzaldehyde derivatives . 
Output:  dimethylsulfonium
The reaction mechanism for the Johnson – Corey – Chaykovsky reaction consists of nucleophilic addition of the ylide to the carbonyl or imine group . A negative charge is transferred to the heteroatom and because the sulfonium cation is a good leaving group it gets expelled forming the ring . In the related Wittig reaction , the formation of the much stronger phosphorus @-@ oxygen double bond prevents oxirane formation and instead , olefination takes place through a 4 @-@ membered cyclic intermediate . The trans diastereoselectivity observed results from the reversibility of the initial addition , allowing equilibration to the favored anti betaine over the syn betaine . Initial addition of the ylide results in a betaine with adjacent charges ; density functional theory calculations have shown that the rate @-@ limiting step is rotation of the central bond into the conformer necessary for backside attack on the sulfonium . The degree of reversibility in the initial step ( and therefore the diastereoselectivity ) depends on four factors , with greater reversibility corresponding to higher selectivity : Stability of the substrate with higher stability leading to greater reversibility by favoring the starting material over the betaine . Stability of the ylide with higher stability similarly leading to greater reversibility . Steric hindrance in the betaine with greater hindrance leading to greater reversibility by disfavoring formation of the intermediate and slowing the rate @-@ limiting rotation of the central bond . Solvation of charges in the betaine by counterions such as lithium with greater solvation allowing more facile rotation in the betaine intermediate , lowering the amount of reversibility . fill in the blank  :  The reaction mechanism for the Johnson – Corey – Chaykovsky reaction consists of nucleophilic addition of the ylide to the carbonyl or __________________ group . 
Output:  imine
The application of the Johnson – Corey – Chaykovsky reaction in organic synthesis is diverse . The reaction has come to encompass reactions of many types of sulfur ylides with electrophiles well beyond the original publications . It has seen use in a number of high @-@ profile total syntheses , as detailed below , and is generally recognized as a powerful transformative tool in the organic repertoire . fill in the blank  :  The application of the Johnson – Corey – Chaykovsky reaction in __________________ synthesis is diverse . 
Output:  organic
Many types of ylides can be prepared with various functional groups both on the anionic carbon center and on the sulfur . The substitution pattern can influence the ease of preparation for the reagents ( typically from the sulfonium halide , e.g. trimethylsulfonium iodide ) and overall reaction rate in various ways . The general format for the reagent is shown on the right . Use of a sulfoxonium allows more facile preparation of the reagent using weaker bases as compared to sulfonium ylides . ( The difference being that a sulfoxonium contains a doubly bonded oxygen whereas the sulfonium does not . ) The former react slower due to their increased stability . In addition , the dialkylsulfoxide by @-@ products of sulfoxonium reagents are greatly preferred to the significantly more toxic , volatile , and odorous dialkylsulfide by @-@ products from sulfonium reagents . The vast majority of reagents are monosubstituted at the ylide carbon ( either R1 or R2 as hydrogen ) . Disubstituted reagents are much rarer but have been described : If the ylide carbon is substituted with an electron @-@ withdrawing group ( EWG ) , the reagent is referred to as a stabilized ylide . These , similarly to sulfoxonium reagents , react much slower and are typically easier to prepare . These are limited in their usefulness as the reaction can become prohibitively sluggish : examples involving amides are widespread , with many fewer involving esters and virtually no examples involving other EWG 's . For these , the related Darzens reaction is typically more appropriate . If the ylide carbon is substituted with an aryl or allyl group , the reagent is referred to as a semi @-@ stabilized ylide . These have been developed extensively , second only to the classical methylene reagents ( R1  R2  H ) . The substitution pattern on aryl reagents can heavily influence the selectivity of the reaction as per the criteria above . If the ylide carbon is substituted with an alkyl group the reagent is referred to as an unstabilized ylide . The size of the alkyl groups are the major factors in selectivity with these reagents . The R @-@ groups on the sulfur , though typically methyls , have been used to synthesize reagents that can perform enantioselective variants of the reaction ( See Variations below ) . The size of the groups can also influence diastereoselectivity in alicyclic substrates .  fill in the blank  :  Many types of ylides can be __________________ with various functional groups both on the anionic carbon center and on the sulfur . 
Output:  prepared
Reactions of sulfur ylides with ketones and aldehydes to form epoxides are by far the most common application of the Johnson – Corey – Chaykovsky reaction . Examples involving complex substrates and ' exotic ' ylides have been reported , as shown below . The reaction has been used in a number of notable total syntheses including the Danishefsky Taxol total synthesis , which produces the chemotherapeutic drug taxol , and the Kuehne Strychnine total synthesis which produces the pesticide strychnine . fill in the blank  : Reactions of sulfur ylides with ketones and aldehydes to __________________ epoxides are by far the most common application of the Johnson – Corey – Chaykovsky reaction . 
Output:  form
The synthesis of aziridines from imines is another important application of the Johnson – Corey – Chaykovsky reaction and provides an alternative to amine transfer from oxaziridines . Though less widely applied , the reaction has a similar substrate scope and functional group tolerance to the carbonyl equivalent . The examples shown below are representative ; in the latter , an aziridine forms in situ and is opened via nucleophilic attack to form the corresponding amine . fill in the blank  :The synthesis of aziridines from imines is another important application of the Johnson – Corey – Chaykovsky reaction and provides an __________________ to amine transfer from oxaziridines . 
Output:  alternative
For addition of sulfur ylides to enones , higher 1 @,@ 4 @-@ selectivity is typically obtained with sulfoxonium reagents than with sulfonium reagents . Many electron @-@ withdrawing groups have been shown compatible with the reaction including ketones , esters , and amides ( the example below involves a Weinreb amide ) . With further conjugated systems 1 @,@ 6 @-@ addition tends to predominate over 1 @,@ 4 @-@ addition . fill in the blank  : For addition of sulfur __________________ to enones , higher 1 @,@ 4 @-@ selectivity is typically obtained with sulfoxonium reagents than with sulfonium reagents . 
Output:  ylides
In addition to the reactions originally reported by Johnson , Corey , and Chaykovsky , sulfur ylides have been used for a number of related homologation reactions that tend to be grouped under the same name . With epoxides and aziridines the reaction serves as a ring @-@ expansion to produce the corresponding oxetane or azetidine . The long reaction times required for these reactions prevent them from occurring as significant side reactions when synthesizing epoxides and aziridines . Several cycloadditions wherein the ylide serves as a nucleophilic carbenoid equivalent  have been reported . Living polymerizations using trialkylboranes as the catalyst and ( dimethyloxosulfaniumyl ) methanide as the monomer have been reported for the synthesis of various complex polymers . fill in the blank  :  __________________ addition to the reactions orig__________________ally reported by Johnson , Corey , and Chaykovsky , sulfur ylides have been used for a number of related homologation reactions that tend to be grouped under the same name . 
Output:  In
The development of an enantioselective ( i.e. yielding an enantiomeric excess , which is labelled as  ee  ) variant of the Johnson – Corey – Chaykovsky reaction remains an active area of academic research . The use of chiral sulfides in a stoichiometric fashion has proved more successful than the corresponding catalytic variants , but the substrate scope is still limited in all cases . The catalytic variants have been developed almost exclusively for enantioselective purposes ; typical organosulfide reagents are not prohibitively expensive and the racemic reactions can be carried out with equimolar amounts of ylide without raising costs significantly . Chiral sulfides , on the other hand , are more costly to prepare , spurring the advancement of catalytic enantioselective methods . fill in the blank  :  The development of an __________________ ( i.e. 
Output:  enantioselective