In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).

Context: The Deutsche Luftstreitkräfte (German Air Force)known before October 1916 as the Fliegertruppen des deutschen Kaiserreiches ("Imperial German Flying Corps") or simply Die Fliegertruppewas the World War I (191418) air arm of the German Army, of which it remained an integral part. In English-language sources it is usually referred to as the Imperial German Air Service, although that is not a literal translation of either name. German naval aviators serving with the "Marine-Fliegerabteilung" remained an integral part of the Imperial German Navy "(Kaiserliche Marine)". Both military branches, the army and navy, operated conventional aircraft, observation balloons and Zeppelins., The Luftwaffe was the aerial warfare branch of the combined German Wehrmacht military forces during World War II. Germany's military air arms during the First World War, the "Luftstreitkräfte" of the Army and the "Marine-Fliegerabteilung" of the Navy, had been disbanded in May 1920 as a result of the terms of the Treaty of Versailles which stated that Germany was forbidden to have any air force., A flying ace or fighter ace is a military aviator credited with shooting down several enemy aircraft during aerial combat. The actual number of aerial victories required to officially qualify as an "ace" has varied, but is usually considered to be five or more. The few aces among combat aviators have historically accounted for the majority of air-to-air victories in military history., The Wehrmacht (lit. "defence force") was the unified armed forces of Nazi Germany from 1935 to 1946. It consisted of the "Heer" (army), the "Kriegsmarine" (navy) and the "Luftwaffe" (air force). The designation "Wehrmacht" for Nazi Germany's military replaced the previously used term, "Reichswehr" (191935), and was the manifestation of Nazi Germany's efforts to rearm the nation to a greater extent than the Treaty of Versailles permitted., The Messerschmitt Bf 109, was a German World War II fighter aircraft that was the backbone of the Luftwaffe's fighter force. The Bf 109 first saw operational service during the Spanish Civil War (1939) and was still in service at the dawn of the jet age at the end of World War II (1945). It was one of the most advanced fighters of the era, including such features as all-metal monocoque construction, a closed canopy, and retractable landing gear. It was powered by a liquid-cooled, inverted-V12 aero engine.
From the end of 1941, the Bf 109 was steadily being supplemented by the superior Focke-Wulf Fw 190., An aircraft is a machine that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines., Squadron leader (Sqn Ldr in the RAF and PAF; SQNLDR in the RAAF and RNZAF; formerly sometimes S/L in all services) is a commissioned rank in the Royal Air Force and the air forces of many countries which have historical British influence. It is also sometimes used as the English translation of an equivalent rank in countries which have a non-English air force-specific rank structure. , The Desert Air Force (DAF), also known chronologically as Air Headquarters Western Desert, Air Headquarters Libya, the Western Desert Air Force, and the First Tactical Air Force (1TAF), was an Allied tactical air force created from No. 204 Group under RAF Middle East Command in North Africa in 1941 to provide close air support to the British Eighth Army. Throughout World War II, the DAF was made up of squadrons from the Royal Air Force (RAF), the South African Air Force (SAAF), the Royal Australian Air Force (RAAF), the United States Army Air Forces (USAAF) and other Allied air forces., Hans-Joachim Marseille (13 December 1919  30 September 1942) was a "Luftwaffe" fighter pilot and flying ace during World War II. He is noted for his aerial battles during the North African Campaign and his Bohemian lifestyle. One of the most successful fighter pilots, he was nicknamed the "Star of Africa". Marseille claimed all but seven of his "official" 158 victories against the British Commonwealth's Desert Air Force over North Africa, flying the Messerschmitt Bf 109 fighter for his entire combat career. No other pilot claimed as many Western Allied aircraft as Marseille., Squadron Leader Derek Harland Ward , DFC & Bar , was a New Zealand flying ace during the Second World War . He was credited with six kills , one shared destroyed , one probable and four damaged against the Luftwaffe . Ward was shot down and killed by the German ace Hans - Joachim Marseille on 17 June 1942 . Among his notable victories was a Focke - Wulf 200 `` Condor '' , destroyed on 1 May 1942 ., The Royal Air Force (RAF) is the United Kingdom's aerial warfare force. Formed towards the end of the First World War on 1 April 1918, it is the oldest independent air force in the world. Following victory over the Central Powers in 1918 the RAF emerged as, at the time, the largest air force in the world. Since its formation, the RAF has taken a significant role in British military history, in particular, playing a large part in the Second World War where it fought its most famous campaign, the Battle of Britain., Subject: derek harland ward, Relation: military_branch, Options: (A) air force (B) aircraft (C) german air force (D) imperial german navy (E) kriegsmarine (F) luftstreitkräfte (G) luftwaffe (H) navy (I) reichswehr (J) royal air force (K) squadron (L) wehrmacht
royal air force

Context: Southern rock is a subgenre of rock music and a genre of Americana. It developed in the Southern United States from rock and roll, country music, and blues, and is focused generally on electric guitar and vocals. Although the origin of the term Southern rock is unknown, "many people feel that these important contributors to the development of rock and roll have been minimized in rock's history.", The Byrds were an American rock band, formed in Los Angeles, California in 1964. The band underwent multiple lineup changes throughout its existence, with frontman Roger McGuinn (known as Jim McGuinn until mid-1967) remaining the sole consistent member, until the group disbanded in 1973. Although they only managed to attain the huge commercial success of contemporaries like the Beatles, the Beach Boys, and the Rolling Stones for a short period in late 1965, the Byrds are today considered by critics to be one of the most influential bands of the 1960s. Initially, they pioneered the musical genre of folk rock, melding the influence of the Beatles and other British Invasion bands with contemporary and traditional folk music. As the 1960s progressed, the band was also influential in originating psychedelic rock, raga rock, and country rock., Europe is a continent that comprises the westernmost part of Eurasia. Europe is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, and the Mediterranean Sea to the south. To the east and southeast, Europe is generally considered as separated from Asia by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways of the Turkish Straits. Yet the non-oceanic borders of Europea concept dating back to classical antiquityare arbitrary. The primarily physiographic term "continent" as applied to Europe also incorporates cultural and political elements whose discontinuities are not always reflected by the continent's current overland boundaries., Craig Fuller (born July 18, 1949) is an American musician and songwriter. Co-founder of Pure Prairie League, along with John David Call and George Ed Powell. Fuller departed in 1973 after their second album, "Bustin' Out", due to draft board problems. He returned to the music business in 1976 for two LPs with American Flyer. After American Flyer dissolved, Fuller returned to record one LP with former Flyer member Eric Kaz. , Robert Michael Nesmith (born December 30, 1942) is an American musician, songwriter, actor, producer, novelist, businessman, and philanthropist, best known as a member of the pop rock band the Monkees and co-star of the TV series "The Monkees" (19661968). Nesmith's songwriting credits include "Different Drum" (sung by Linda Ronstadt with the Stone Poneys). He is also an executive producer of the cult film "Repo Man" (1984). In 1981, Nesmith won the first Grammy Award given for Video of the Year for his hour-long television show, "Elephant Parts"., Larry Eugene Boone (born June 7, 1956) is an American country music artist. Between 1985 and 1993, Boone recorded five major label studio albums, in addition to charting several singles on the "Billboard" Hot Country Singles charts. His highest-charting single, "Don't Give Candy to a Stranger", reached No. 10 in 1988. Boone has also co-written several singles for other country music artists, including a Number One single for Kathy Mattea, and Top Ten hits for Don Williams, Tracy Lawrence, Rick Trevino and Lonestar., Pure Prairie League is an American country rock band whose roots go back to 1965 and Waverly, Ohio, with Craig Fuller, Tom McGrail, Jim Caughlan, and John David Call. In 1970 McGrail named the band after a fictional 19th century temperance union featured in the 1939 Errol Flynn cowboy film "Dodge City". The band had five consecutive Top 40 LPs in the 1970s and added a sixth in the 1980s. The band has had a long run, active from the 1970s through the late 1980s and was revived in the late 1990s for a time, then again in 2004. As of 2016, they are still doing at least 100 shows a year., "You Walked In" is a song performed by American country music group Lonestar. It was written by Canadian pop-rock star Bryan Adams and producer Robert "Mutt" Lange. The song was released in August 1997 as second single from Lonestar's album "Crazy Nights"., Fiddle is another name for the bowed string musical instrument more often called a violin. It is also a colloquial term for the instrument used by players in all genres, including classical music. Fiddle playing, or fiddling, refers to various styles of music. Fiddle is also a common term among musicians who play folk music on the violin. The fiddle is part of many traditional (folk) styles of music which are aural traditions, taught 'by ear' rather than via written music. Fiddle is normally the term used for Irish Traditional Music., Bryan Guy Adams, (born 5 November 1959) is a Canadian singer, songwriter, record producer, guitarist, photographer, philanthropist and activist., The harmonica, also known as a French harp or mouth organ, is a free reed wind instrument used worldwide in many musical genres, notably in blues, American folk music, classical music, jazz, country, and rock and roll. There are many types of harmonica, including diatonic, chromatic, tremolo, octave, orchestral, and bass versions. A harmonica is played by using the mouth (lips and tongue) to direct air into or out of one or more holes along a mouthpiece. Behind each hole is a chamber containing at least one reed. A harmonica reed is a flat elongated spring typically made of brass, stainless steel, or bronze, which is secured at one end over a slot that serves as an airway. When the free end is made to vibrate by the player's air, it alternately blocks and unblocks the airway to produce sound., John Rich (born January 7, 1974) is an American country music singer-songwriter. From 1992 to 1998, he was a member of the country music band Lonestar, in which he played bass guitar and alternated with Richie McDonald as lead vocalist. After departing from the band in 1998, he embarked on a solo career on BNA Records in the late 1990s, releasing two singles for the label and recording "Underneath the Same Moon", which was not released until 2006. By 2003, he joined Big Kenny to form the duo Big & Rich, who released three albums on Warner Bros. Records as well as ten singles, including the Number One "Lost in This Moment". After Big & Rich went on hiatus in 2007, Rich began work on a second solo album, "Son of a Preacher Man", which has produced two more chart singles. In 2011, Rich released two Extended Plays, "Rich Rocks" and "For the Kids" before re-establishing Big & Rich in 2012., The word Dobro is, in popular usage, the generic term for a wood-bodied, single cone resonator guitar. It is also an American brand of resonator guitar, currently owned by the Gibson Guitar Corporation. The Dobro was originally made by the Dopyera brothers when they formed the Dobro Manufacturing Company. Their design, with a single inverted resonator, was introduced in competition to the patented Tricone and biscuit designs produced by the National String Instrument Corporation. The Dobro name appeared on other instruments, notably electric lap steel guitars and solid body electric guitars and on other resonator instruments such as Safari resonator mandolins., Recorded history or written history is a historical narrative based on a written record or other documented communication. Recorded history can be contrasted with other narratives of the past, such as mythological, oral or archeological traditions., George Harrison, (25 February 1943  29 November 2001) was an English guitarist, singer, songwriter, and music and film producer who achieved international fame as the lead guitarist of the Beatles. Often referred to as "the quiet Beatle", Harrison embraced Hindu mythology and helped broaden the horizons of his fellow Beatles as well as their Western audience by incorporating Indian instrumentation in their music. Although most of the Beatles' songs were written by John Lennon and Paul McCartney, most Beatles albums from 1965 onwards contained at least two Harrison compositions. His songs for the group included "Taxman", "Within You Without You", "While My Guitar Gently Weeps", "Here Comes the Sun" and "Something", the last of which became the Beatles' second-most covered song., McAlyster was an American country music group founded in Pensacola, Florida. Its members comprised Cody Collins, Josh Walther, Leigh Usilton and Valerie Gills. They were signed to MCA Nashville Records in 2000. Their debut single, "I Know How the River Feels", was previously a No. 32 country single in 1999 for Diamond Rio, and was originally recorded by Ty Herndon on his 1996 album "Living in a Moment". McAlyster's demo rendition was released as a single, peaking at No. 69 on the country charts. In 2007, former member Cody Collins succeeded Richie McDonald as lead singer of the group Lonestar, while Walther began a solo career and forming the cover band Phase 5 which shared the stage with Paul McCartney at an event in 2015., Country rock is subgenre of popular music, formed from the fusion of rock and country. It was developed by rock musicians who began to record country-flavored records in the late-1960s and early-1970s. These musicians recorded rock records using country themes, vocal styles, and additional instrumentation, most characteristically pedal steel guitars. Country rock began with Bob Dylan and The Byrds, reaching its greatest popularity in the 1970s with artists such as Emmylou Harris, the Eagles, Michael Nesmith, Poco and Pure Prairie League. Country rock also influenced artists in other genres, including The Band, Grateful Dead, Creedence Clearwater Revival, The Rolling Stones, and George Harrison's solo work. It also played a part in the development of Southern rock., Wally Wilson (born September 19, 1947), is an American record producer and songwriter based in Nashville., Lonestar is an American country music group consisting of Richie McDonald (lead vocals, acoustic guitar), Michael Britt (lead guitar, background vocals), Keech Rainwater (drums), and Dean Sams (keyboards, background vocals). Before the group's foundation in 1992, both Rainwater and Britt were members of the group Canyon. John Rich (bass guitar, lead and background vocals) was a member until he left in 1998, and later became one half of the duo Big & Rich, as well as a Nashville songwriter and record producer. Between 2007 and 2011, McDonald exited the band for a solo career, with former McAlyster lead singer Cody Collins replacing him until McDonald rejoined., Crazy Nights is the second studio album released by country music band Lonestar . Four singles were released from this album : `` Come Cryin ' to Me '' , `` You Walked In '' , `` Say When '' , and `` Everything 's Changed '' . `` Come Cryin ' to Me '' reached number one on the Hot Country Songs charts . Also included is a cover of country rock band Pure Prairie League 's single `` Amie '' . `` Come Cryin ' to Me '' and `` Say When '' were both co-written by John Rich , who also sang lead on `` John Doe on a John Deere '' and `` What Do We Do with the Rest of the Night '' . All the other tracks feature Richie McDonald on lead vocals . This was also Rich 's last album as a member of the group . After being fired from the group in 1998 , he began a solo career on BNA , and eventually joined Big Kenny in the duo Big & Rich . `` Cheater 's Road '' was later recorded by Chalee Tennison on her 2003 album Parading in the Rain ., Richard Vance "Richie" McDonald (born February 6, 1962) is an American country music singer and songwriter. From 1992 until his departure in 2007, he was the lead singer of the group Lonestar, which recorded seven studio albums on BNA Records during his tenure as lead vocalist. McDonald co-wrote several of the band's singles, and sang lead on all but one of them; he would rejoin the band in 2011. Outside Lonestar, he has charted twice as a guest vocalist on others' songs, in addition to releasing two independent albums and four solo singles., The Rolling Stones are an English rock band formed in London in 1962. The original line-up consisted of Brian Jones (rhythm guitar, harmonica), Mick Jagger (lead vocals), Keith Richards (lead guitar, backing vocals), Ian Stewart (piano), Bill Wyman (bass) and Charlie Watts (drums). Stewart was removed from the official line-up in 1963 but continued as a touring member until his death in 1985. Jones left the band less than a month prior to his death in 1969, having already been replaced by Mick Taylor, who remained until 1974. After Taylor left the band, Ronnie Wood took his place in 1975 and has been on guitar in tandem with Richards ever since. Following Wyman's departure in 1993, Darryl Jones joined as their touring bassist. Other touring keyboardists for the band have been Nicky Hopkins (196782), Billy Preston (through the mid 1970s) and Chuck Leavell (1982-present). The band was first led by Jones, but after teaming as the band's songwriters, Jagger and Richards assumed leadership while Jones dealt with legal and personal troubles., The Grateful Dead was an American rock band formed in 1965 in Palo Alto, California. Ranging from quintet to septet, the band is known for its unique and eclectic style, which fused elements of country, folk, bluegrass, blues, reggae, rock, improvisational jazz, psychedelia, and space rock, for live performances of lengthy instrumental jams, and for their devoted fan base, known as "Deadheads". "Their music," writes Lenny Kaye, "touches on ground that most other groups don't even know exists." These various influences were distilled into a diverse and psychedelic whole that made the Grateful Dead "the pioneering Godfathers of the jam band world". The band was ranked 57th by "Rolling Stone" magazine in its "The Greatest Artists of all Time" issue. The band was inducted into the Rock and Roll Hall of Fame in 1994 and their Barton Hall Concert at Cornell University (May 8, 1977) was added to the National Recording Registry of the Library of Congress. The Grateful Dead have sold more than 35 million albums worldwide., "Come Cryin' to Me" is a song recorded by American country music group Lonestar. It was released in April 1997 as the first single and opening track from their album "Crazy Nights". The song reached the top of the "Billboard" Hot Country Singles & Tracks chart. The song was the band's second Number One hit, as well as the first single of their career to be co-written by then-member John Rich, who later left the band in 1998 to pursue a solo career. It was written by Rich with Wally Wilson and Mark D. Sanders. , Country music is a genre of United States popular music that originated in the southern United States in the 1920s. It takes its roots from the southeastern genre of United States, such as folk music (especially Appalachian folk music), and blues music. Blues modes have been used extensively throughout its recorded history. Country music often consists of ballads and dance tunes with generally simple forms and harmonies accompanied by mostly string instruments such as banjos, electric and acoustic guitars, dobros and fiddles as well as harmonicas. According to Lindsey Starnes, the term "country music" gained popularity in the 1940s in preference to the earlier term "hillbilly music"; it came to encompass Western music, which evolved parallel to hillbilly music from similar roots, in the mid-20th century. The term "country music" is used today to describe many styles and subgenres. The origins of country music are the folk music of working-class Americans, who blended popular songs, Irish and Celtic fiddle tunes, traditional English ballads, and cowboy songs, and various musical traditions from European immigrant communities. In 2009 country music was the most listened to rush hour radio genre during the evening commute, and second most popular in the morning commute in the United States., "Everything's Changed" is a song written by Richie McDonald, Larry Boone and Paul Nelson, and performed by American country music band Lonestar. It was released in June 1998 as the fourth and final single from their album "Crazy Nights". Their ninth chart single overall, it was also the last single to feature bass guitarist John Rich, who departed from the band shortly after this song was released as a single. The song peaked at number 2 on the Hot Country Singles & Tracks (now Hot Country Songs) chart, and number 95 on the "Billboard" Hot 100., Creedence Clearwater Revival, often informally abbreviated to Creedence or CCR, was an American rock band active in the late 1960s and early 1970s. The band consisted of lead vocalist, lead guitarist, and primary songwriter John Fogerty, his brother rhythm guitarist Tom Fogerty, bassist Stu Cook and drummer Doug Clifford. Their musical style encompassed the roots rock, swamp rock, and blues rock genres. Despite their San Francisco Bay Area origins, they played in a Southern rock style, with lyrics about bayous, catfish, the Mississippi River, and other popular elements of Southern United States iconography, as well as political and socially-conscious lyrics about topics including the Vietnam War. The band performed at 1969's famed Woodstock Festival., Poco is a Southern California country rock band originally formed by Richie Furay, Jim Messina and Rusty Young. Formed following the demise of Buffalo Springfield in 1968, Poco was part of the first wave of the West Coast country rock genre. The title of their first album, "Pickin' Up the Pieces", is a reference to the break-up of Buffalo Springfield. Throughout the years Poco has performed in various groupings, and is still active., Lead guitar is a guitar part which plays melody lines, instrumental fill passages, guitar solos, and occasionally, some riffs within a song structure. The lead is the featured guitar, which usually plays single-note-based lines or double-stops.
In rock, heavy metal, blues, jazz, punk, fusion, some pop, and other music styles, lead guitar lines are usually supported by a second guitarist who plays rhythm guitar, which consists of accompaniment chords and riffs., Subject: crazy nights , Relation: record_label, Options: (A) 1996 (B) album (C) bna records (D) country music (E) english (F) europe (G) festival (H) grateful dead (I) melody (J) pop (K) record (L) reggae (M) rock music (N) rock records (O) safari (P) sole (Q) spring (R) the beatles (S) the monkees (T) tracy lawrence (U) violin (V) warner bros .
bna records

Context: Chicago Transit Authority, also known as CTA, is the operator of mass transit in Chicago, Illinois and some of its surrounding suburbs, including the trains of the Chicago "L" and CTA bus service., The Chicago Surface Lines (CSL) was operator of the street railway system of Chicago, Illinois, from the years 1913 to 1947. The firm is a predecessor of today's publicly owned operator, the Chicago Transit Authority., North America is a continent entirely within the Northern Hemisphere and almost all within the Western Hemisphere. It can also be considered a northern subcontinent of the Americas. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the west and south by the Pacific Ocean, and to the southeast by South America and the Caribbean Sea., The Chicago metropolitan area, or Chicagoland, is the metropolitan area associated with the city of Chicago, Illinois, and its suburbs. With an estimated population of 9.4 million people, it is the third largest metropolitan area in the United States. Chicagoland is the area that is closely linked to the city through geographic, social, economic, and cultural ties., A county is a geographical region of a country used for administrative or other purposes, in certain modern nations. The term is derived from the Old French "conté" or "cunté" denoting a jurisdiction under the sovereignty of a count (earl) or a viscount. The modern French is "comté", and its equivalents in other languages are "contea", "contado", "comtat", "condado", "Grafschaft", "graafschap", "Gau", etc. (cf. "conte", "comte", "conde", "Graf")., The Midwestern United States, also referred to as the American Midwest or simply the Midwest, is one of the four geographic regions defined by the United States Census Bureau, occupying the northern central part of the United States of America. It was officially named the North Central region by the Census Bureau until 1984., Chicago (or ), officially the City of Chicago, is the third-most populous city in the United States, and the fifth-most populous city in North America. With over 2.7 million residents, it is the most populous city in the state of Illinois and the Midwestern United States, and the county seat of Cook County. The Chicago metropolitan area, often referred to as Chicagoland, has nearly 10 million people and is the third-largest in the U.S., Illinois is a state in the midwestern region of the United States, achieving statehood in 1818. It is the 5th most populous state and 25th largest state in terms of land area, and is often noted as a microcosm of the entire country. The word "Illinois" comes from the Algonquin word for "tribe of superior men". With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal, timber, and petroleum in the south, Illinois has a diverse economic base and is a major transportation hub. The Port of Chicago connects the state to other global ports from the Great Lakes, via the Saint Lawrence Seaway, to the Atlantic Ocean, as well as the Great Lakes to the Mississippi River, via the Illinois River. For decades, O'Hare International Airport has been ranked as one of the world's busiest airports. Illinois has long had a reputation as a bellwether both in social and cultural terms and politics., The Chicago City Railway Company ( CCRy ) was an urban transit company that operated horse , cable , and electric streetcars on Chicago 's South Side between 1859 and 1914 , when it became merged into and part of the Chicago Surface Lines ( CSL ) metropolitan - wide system . After that time it owned electric streetcars , along with gasoline , diesel , and propane - fueled transit busses . Purchased by the government agency Chicago Transit Authority ( CTA ) in 1947 , it was liquidated in 1950 ., Subject: chicago city railway, Relation: instance_of, Options: (A) airport (B) area (C) base (D) bus (E) city (F) continent (G) county (H) earl (I) four (J) geographical (K) jurisdiction (L) mass (M) metropolitan (N) metropolitan area (O) ocean (P) operator (Q) part (R) politics (S) railway system (T) region (U) river (V) sea (W) service (X) state (Y) surface (Z) system ([) the city (\) united states census

railway system