sentence-transformers/squad huggingface dataset:
Passage: Intel had tried unsuccessfully to push Apple to migrate the Macintosh platform to Intel chips. Apple concluded that Intel's CISC (Complex Instruction Set Computer) architecture ultimately would not be able to compete against RISC (Reduced Instruction Set Computer) processors. While the Motorola 68040 offered the same features as the Intel 80486 and could on a clock-for-clock basis significantly outperform the Intel chip, the 486 had the ability to be clocked significantly faster without suffering from overheating problems, especially the clock-doubled i486DX2 which ran the CPU logic at twice the external bus speed, giving such equipped IBM compatible systems a significant performance lead over their Macintosh equivalents. Apple's product design and engineering didn't help matters as they restricted the use of the '040 to their expensive Quadras for a time while the 486 was readily available to OEMs as well as enthusiasts who put together their own machines. In late 1991, as the higher-end Macintosh desktop lineup transitioned to the '040, Apple was unable to offer the '040 in their top-of-the-line PowerBooks until early 1994 with the PowerBook 500 series, several years after the first 486-powered IBM compatible laptops hit the market which cost Apple considerable sales. In 1993 Intel rolled out the Pentium processors as the successor to the 486, while the Motorola 68050 was never released, leaving the Macintosh platform a generation behind IBM compatibles in the latest CPU technology. In 1994, Apple abandoned Motorola CPUs for the RISC PowerPC architecture developed by the AIM alliance of Apple Computer, IBM, and Motorola. The Power Macintosh line, the first to use the new chips, proved to be highly successful, with over a million PowerPC units sold in nine months. However, in the long run, spurning Intel for the PowerPC was a mistake as the commoditization of Intel-architecture chips meant Apple couldn't compete on price against "the Dells of the world".

Question: What did Intel unsuccessfully try to push Apple to migrate to?

Question: Which platform did Apple choose to use?

Question: Who first rolled out Pentium processors in 1993?

Question: How far behind was Macintosh set back compared to the new IBM compatibles?

Question: When did Apple abandon Motorola CPU's?
Passage: In 1998, Apple introduced its new iMac which, like the original 128K Mac, was an all-in-one computer. Its translucent plastic case, originally Bondi blue and later various additional colors, is considered an industrial design landmark of the late 1990s. The iMac did away with most of Apple's standard (and usually proprietary) connections, such as SCSI and ADB, in favor of two USB ports. It replaced a floppy disk drive with a CD-ROM drive for installing software, but was incapable of writing to CDs or other media without external third-party hardware. The iMac proved to be phenomenally successful, with 800,000 units sold in 139 days. It made the company an annual profit of US$309 million, Apple's first profitable year since Michael Spindler took over as CEO in 1995. This aesthetic was applied to the Power Macintosh and later the iBook, Apple's first consumer-level laptop computer, filling the missing quadrant of Apple's "four-square product matrix" (desktop and portable products for both consumers and professionals). More than 140,000 pre-orders were placed before it started shipping in September, and by October proved to be a large success.

Question: What color was Apples new iMac, which was introduced in 1998?

Question: What did the iMac replace most of Apple's standard connections with?

Question: What did the iMac replace the floppy disk drive with?

Question: What did the iMac need to use in order to write CDs or other media?

Question: How many iMac units sold in the first 139 days?
Passage: Apple discontinued the use of PowerPC microprocessors in 2006. At WWDC 2005, Steve Jobs announced this transition, revealing that Mac OS X was always developed to run on both the Intel and PowerPC architectures. All new Macs now use x86 processors made by Intel, and some were renamed as a result. Intel-based Macs running OS X 10.6 and below (support has been discontinued since 10.7) can run pre-existing software developed for PowerPC using an emulator called Rosetta, although at noticeably slower speeds than native programs. However, the Classic environment is unavailable on the Intel architecture. Intel chips introduced the potential to run the Microsoft Windows operating system natively on Apple hardware, without emulation software such as Virtual PC. In March 2006, a group of hackers announced that they were able to run Windows XP on an Intel-based Mac. The group released their software as open source and has posted it for download on their website. On April 5, 2006, Apple announced the availability of the public beta of Boot Camp, software that allows owners of Intel-based Macs to install Windows XP on their machines; later versions added support for Windows Vista and Windows 7. Classic was discontinued in Mac OS X 10.5, and Boot Camp became a standard feature on Intel-based Macs.

Question: When did Apple discontinue the use of PowerPC microprocessors?

Question: Who announced the capability to run Windows XP on an Intel-based Mac in 2006?

Question: How did hackers release their software for running Windows on Macs?

Question: When did Apple announce software that would allow Windows XP to be run on Intel-based Macs?

Question: What is the name of the software that Apple introduced for running Windows XP?
Passage: Apple was initially reluctant to embrace mice with multiple buttons and scroll wheels. Macs did not natively support pointing devices that featured multiple buttons, even from third parties, until Mac OS X arrived in 2001. Apple continued to offer only single button mice, in both wired and Bluetooth wireless versions, until August 2005, when it introduced the Mighty Mouse. While it looked like a traditional one-button mouse, it actually had four buttons and a scroll ball, capable of independent x- and y-axis movement. A Bluetooth version followed in July 2006. In October 2009, Apple introduced the Magic Mouse, which uses multi-touch gesture recognition (similar to that of the iPhone) instead of a physical scroll wheel or ball. It is available only in a wireless configuration, but the wired Mighty Mouse (re-branded as "Apple Mouse") is still available as an alternative. Since 2010, Apple has also offered the Magic Trackpad as a means to control Macintosh desktop computers in a way similar to laptops.

Question: Who was initially reluctant to embrace mice with multiple buttons and scroll wheels?

Question: What was the name of the 1st multiple button mouse introduced by Apple?

Question: How many buttons did the Mighty Mouse have?

Question: What did Apple introduce to take the place of a physical scroll wheel in 2009?

Question: What Apple mouse 1st used multi-touch gesture recognition?
Passage: Following the release of Intel-based Macs, third-party platform virtualization software such as Parallels Desktop, VMware Fusion, and VirtualBox began to emerge. These programs allow users to run Microsoft Windows or previously Windows-only software on Macs at near native speed. Apple also released Boot Camp and Mac-specific Windows drivers that help users to install Windows XP or Vista and natively dual boot between Mac OS X and Windows. Though not condoned by Apple, it is possible to run the Linux operating system using Boot camp or other virtualization workarounds. Unlike most PCs, however, Macs are unable to run many legacy PC operating systems. In particular, Intel-based macs lack the A20 gate.

Question: What type of software began to emerge following the release of Intel-based Macs?

Question: At what speed do programs such as VirtualBox allow Microsoft Windows to run on Macs?

Question: What is possible to run by using Boot camp, even though it is not condoned by Apple?

Question: What do Macs lack that makes them unable to run many legacy PC operating systems?
Passage: Although the PC market declined, Apple still managed to ship 2.8 million MacBooks in Q2 2012 (the majority of which are the MacBook Air) compared to 500,000 total Ultrabooks, although there were dozens of Ultrabooks from various manufacturers on the market while Apple only offered 11-inch and 13-inch models of the MacBook Air. The Air has been the best-selling ultra-portable in certain countries over Windows Ultrabooks, particularly the United States. While several Ultrabooks were able to claim individual distinctions such as being the lightest or thinnest, the Air was regarded by reviewers as the best all-around subnotebook/ultraportable in regard to "OS X experience, full keyboard, superior trackpad, Thunderbolt connector and the higher-quality, all-aluminum unibody construction". The Air was among the first to receive Intel's latest CPUs before other PC manufacturers, and OS X has gained market share on Windows in recent years. Through July 1, 2013, the MacBook Air took in 56 percent of all Ultrabook sales in the United States, although being one of the higher-priced competitors, though several Ultrabooks with better features were often more expensive than the MacBook Air. The competitive pricing of MacBooks was particularly effective when rivals charged more for seemingly equivalent Ultrabooks, as this contradicted the established "elitist aura" perception that Apple products cost more but were higher quality, which made these most expensive Ultrabooks seem exorbitant no matter how valid their higher prices were.

Question: What has been the best-selling ultra-portable over Windows Ultrabooks in the U.S.?

Question: What earned the title as best all-around subnotebook/ultraportable?

Question: What did the Air receive before other PC manufacturers?

Question: Through 7/1/13, what percentage of all Ultrabook sales in the U.S. were MacBook Airs?

Question: When was the competetive pricing of MacBooks especially effective?
Passage: Anti-aircraft warfare or counter-air defence is defined by NATO as "all measures designed to nullify or reduce the effectiveness of hostile air action." They include ground-and air-based weapon systems, associated sensor systems, command and control arrangements and passive measures (e.g. barrage balloons). It may be used to protect naval, ground, and air forces in any location. However, for most countries the main effort has tended to be 'homeland defence'. NATO refers to airborne air defence as counter-air and naval air defence as anti-aircraft warfare. Missile defence is an extension of air defence as are initiatives to adapt air defence to the task of intercepting any projectile in flight.

Question: What is another term for anti-aircraft warfare?

Question: NATO defines anti-aircraft warfare as measures to reduce what?

Question: Barrage balloons are an example of what type of weapons system?

Question: What is the primary effort been for most countries when it comes to anti-aircraft warfare?

Question: What does NATO ascribe naval air defence as?
Passage: Non-English terms for air defence include the German Flak (Fliegerabwehrkanone, "aircraft defence cannon", also cited as Flugabwehrkanone), whence English flak, and the Russian term Protivovozdushnaya oborona (Cyrillic: Противовозду́шная оборо́на), a literal translation of "anti-air defence", abbreviated as PVO. In Russian the AA systems are called zenitnye (i.e. "pointing to zenith") systems (guns, missiles etc.). In French, air defence is called DCA (Défense contre les aéronefs, "aéronef" being the generic term for all kind of airborne device (airplane, airship, balloon, missile, rocket, etc.)).

Question: What is the Russian term for air defence?

Question: What are the AA systems called in Russian?

Question: How is the Russian term for air defence abbreviated?

Question: What is air defence called in French?

Question: What is the generic term for an airplane or rocket in French?
Passage: Initially sensors were optical and acoustic devices developed during the First World War and continued into the 1930s, but were quickly superseded by radar, which in turn was supplemented by optronics in the 1980s. Command and control remained primitive until the late 1930s, when Britain created an integrated system for ADGB that linked the ground-based air defence of the army's AA Command, although field-deployed air defence relied on less sophisticated arrangements. NATO later called these arrangements an "air defence ground environment", defined as "the network of ground radar sites and command and control centres within a specific theatre of operations which are used for the tactical control of air defence operations".

Question: When were sensors initially developed?

Question: Radar was supplemented by what in the 1980s?

Question: What country created an integrated system for ADGB?

Question: What did the integrated system for ADGB link?

Question: What agency stated that the arrangements were an air defence ground environment?
Passage: The most extreme case was the Soviet Union, and this model may still be followed in some countries: it was a separate service, on a par with the navy or ground force. In the Soviet Union this was called Voyska PVO, and had both fighter aircraft and ground-based systems. This was divided into two arms, PVO Strany, the Strategic Air defence Service responsible for Air Defence of the Homeland, created in 1941 and becoming an independent service in 1954, and PVO SV, Air Defence of the Ground Forces. Subsequently these became part of the air force and ground forces respectively

Question: Which country had the most severe case?

Question: This separate service was known as what in the Soviet Union?

Question: What two systems did Voyska PVO have?

Question: What year did the PVO Strany become independent?

Question: What was the arm that was the Air Defence of the Ground Forces?
Passage: On 30 September 1915, troops of the Serbian Army observed three enemy aircraft approaching Kragujevac. Soldiers shot at them with shotguns and machine-guns but failed to prevent them from dropping 45 bombs over the city, hitting military installations, the railway station and many other, mostly civilian, targets in the city. During the bombing raid, private Radoje Ljutovac fired his cannon at the enemy aircraft and successfully shot one down. It crashed in the city and both pilots died from their injuries. The cannon Ljutovac used was not designed as an anti-aircraft gun, it was a slightly modified Turkish cannon captured during the First Balkan War in 1912. This was the first occasion in military history that a military aircraft was shot down with ground-to-air fire.

Question: When did Serbian troops notice enemy aircraft approaching Kragujevac?

Question: How many bombs did the three aircraft drop on the city?

Question: Which private shot down one aircraft with a cannon?

Question: What happened to the pilots that were in the aircraft shot down?

Question: Which war was the cannon used in prior to this event?
Passage: AA gunnery was a difficult business. The problem was of successfully aiming a shell to burst close to its target's future position, with various factors affecting the shells' predicted trajectory. This was called deflection gun-laying, 'off-set' angles for range and elevation were set on the gunsight and updated as their target moved. In this method when the sights were on the target, the barrel was pointed at the target's future position. Range and height of the target determined fuse length. The difficulties increased as aircraft performance improved.

Question: What was the problem with AA gunnery?

Question: Different things could affect what with the shell?

Question: What was updated on the gunsight as a target moved?

Question: Where was the barrel pointed when the sights were on a target?

Question: What two things figured the fuse length?
Passage: World War I demonstrated that aircraft could be an important part of the battlefield, but in some nations it was the prospect of strategic air attack that was the main issue, presenting both a threat and an opportunity. The experience of four years of air attacks on London by Zeppelins and Gotha G.V bombers had particularly influenced the British and was one of if not the main driver for forming an independent air force. As the capabilities of aircraft and their engines improved it was clear that their role in future war would be even more critical as their range and weapon load grew. However, in the years immediately after World War I the prospect of another major war seemed remote, particularly in Europe where the most militarily capable nations were, and little financing was available.

Question: What showed that aircraft could be a significant contribution to the battlefield?

Question: In addition to Zeppelins, what attacked London for four years with air attacks?

Question: The four year air attack was instrumental in Britain forming what?

Question: The future of aircraft in war situations was important because of the growth in what two areas?

Question: Where were most of the nations who had the strongest military after World War I?
Passage: From the early 1930s eight countries developed radar, these developments were sufficiently advanced by the late 1930s for development work on sound locating acoustic devices to be generally halted, although equipment was retained. Furthermore, in Britain the volunteer Observer Corps formed in 1925 provided a network of observation posts to report hostile aircraft flying over Britain. Initially radar was used for airspace surveillance to detect approaching hostile aircraft. However, the German Würzburg radar was capable of providing data suitable for controlling AA guns and the British AA No 1 Mk 1 GL radar was designed to be used on AA gun positions.

Question: How many different countries developed radar starting in the 1930s?

Question: Where was the Observer Corps based?

Question: When was the Observer Corps formed?

Question: What did the Observer Corps observe and report on?

Question: What was originally used to see hostile aircraft approaching?
Passage: Until this time the British, at RAF insistence, continued their World War I use of machine guns, and introduced twin MG mountings for AAAD. The army was forbidden from considering anything larger than .50-inch. However, in 1935 their trials showed that the minimum effective round was an impact fused 2 lb HE shell. The following year they decided to adopt the Bofors 40 mm and a twin barrel Vickers 2-pdr (40 mm) on a modified naval mount. The air-cooled Bofors was vastly superior for land use, being much lighter than the water-cooled pom-pom, and UK production of the Bofors 40 mm was licensed. The Predictor AA No 3, as the Kerrison Predictor was officially known, was introduced with it.

Question: Who wanted the British to keep using machine guns in World War I?

Question: The military was not allowed to use anything that was bigger than what?

Question: What was determined to be the smallest effective round in 1935?

Question: What was lighter than the water-cooled pom-pom?

Question: What is the Kerrison Predictor's official name?
Passage: During the 1930s solid fuel rockets were under development in the Soviet Union and Britain. In Britain the interest was for anti-aircraft fire, it quickly became clear that guidance would be required for precision. However, rockets, or 'unrotated projectiles' as they were called could the used for anti-aircraft barrages. A 2-inch rocket using HE or wire obstacle warheads was introduced first to deal with low-level or dive bombing attacks on smaller targets such as airfields. The 3-inch was in development at the end of the inter-war period.

Question: What was under development in both the Soviet Union and Britain in the 1930s?

Question: Why was Britain mainly interested in solid fuel rockets?

Question: What were rockets called at this time?

Question: How big was the rocket that was introduced to handle dive bombing attacks?

Question: What size rocket was being developed at the end of the war?
Passage: The British had already arranged licence building of the Bofors 40 mm, and introduced these into service. These had the power to knock down aircraft of any size, yet were light enough to be mobile and easily swung. The gun became so important to the British war effort that they even produced a movie, The Gun, that encouraged workers on the assembly line to work harder. The Imperial measurement production drawings the British had developed were supplied to the Americans who produced their own (unlicensed) copy of the 40 mm at the start of the war, moving to licensed production in mid-1941.

Question: What did the British get a license to build?

Question: While light, the Bofors 40mm were powerful enough to take down what size aircraft?

Question: What was produced to inspire people on the assembly line to work harder?

Question: What was the movie made to inspire assembly line workers called?

Question: Who started making an unlicensed version of the 40mm at the beginning of the war?
Passage: The interceptor aircraft (or simply interceptor) is a type of fighter aircraft designed specifically to intercept and destroy enemy aircraft, particularly bombers, usually relying on high speed and altitude capabilities. A number of jet interceptors such as the F-102 Delta Dagger, the F-106 Delta Dart, and the MiG-25 were built in the period starting after the end of World War II and ending in the late 1960s, when they became less important due to the shifting of the strategic bombing role to ICBMs. Invariably the type is differentiated from other fighter aircraft designs by higher speeds and shorter operating ranges, as well as much reduced ordnance payloads.

Question: What kind of aircraft is used to intercept and destroy other aircraft?

Question: What particular aircraft did the interceptor target most?

Question: When were interceptors like the F-102 Delta Dagger first built?

Question: When were interceptors like the F-106 Delta Dart not being built anymore?

Question: The interceptors were no longer built because of the shift of the bombing role to what?
Passage: Another potential weapon system for anti-aircraft use is the laser. Although air planners have imagined lasers in combat since the late 1960s, only the most modern laser systems are currently reaching what could be considered "experimental usefulness". In particular the Tactical High Energy Laser can be used in the anti-aircraft and anti-missile role. If current developments continue, some[who?] believe it is reasonable to suggest that lasers will play a major role in air defence starting in the next ten years.

Question: What is another possible weapon for anti-aircraft use?

Question: When did personnel first start thinking about using lasers in combat?

Question: What laser can currently be used in the type of role that was first thought of in the late 1960s?

Question: The use of lasers in anti-aircraft warfare is currently considered what?

Question: When do some people believe that lasers can play a more prominent role in air defence?
Passage: Area air defence, the air defence of a specific area or location, (as opposed to point defence), have historically been operated by both armies (Anti-Aircraft Command in the British Army, for instance) and Air Forces (the United States Air Force's CIM-10 Bomarc). Area defence systems have medium to long range and can be made up of various other systems and networked into an area defence system (in which case it may be made up of several short range systems combined to effectively cover an area). An example of area defence is the defence of Saudi Arabia and Israel by MIM-104 Patriot missile batteries during the first Gulf War, where the objective was to cover populated areas.

Question: What is the air defence of a certain area called?

Question: Armies as well as what group have operated area air defences?

Question: What U.S. Air Forces operated area air defence?

Question: What range do area defence systems have?

Question: What was the objective of the MIM-104 Patriot Missile batteries during the first Gulf War?