Problem: Electric motor:

In 1824, the French physicist Francois Arago formulated the existence of rotating magnetic fields, termed Arago's rotations, which, by manually turning switches on and off, Walter Baily demonstrated in 1879 as in effect the first primitive induction motor. In the 1880s, many inventors were trying to develop workable AC motors because AC's advantages in long-distance high-voltage transmission were counterbalanced by the inability to operate motors on AC. The first alternating-current commutatorless induction motors were independently invented by Galileo Ferraris and Nikola Tesla, a working motor model having been demonstrated by the former in 1885 and by the latter in 1887. In 1888, the Royal Academy of Science of Turin published Ferraris' research detailing the foundations of motor operation while however concluding that "the apparatus based on that principle could not be of any commercial importance as motor." In 1888, Tesla presented his paper A New System for Alternating Current Motors and Transformers to the AIEE that described three patented two-phase four-stator-pole motor types: one with a four-pole rotor forming a non-self-starting reluctance motor, another with a wound rotor forming a self-starting induction motor, and the third a true synchronous motor with separately excited DC supply to rotor winding. One of the patents Tesla filed in 1887, however, also described a shorted-winding-rotor induction motor. George Westinghouse promptly bought Tesla's patents, employed Tesla to develop them, and assigned C. F. Scott to help Tesla, Tesla left for other pursuits in 1889. The constant speed AC induction motor was found not to be suitable for street cars but Westinghouse engineers successfully adapted it to power a mining operation in Telluride, Colorado in 1891. Steadfast in his promotion of three-phase development, Mikhail Dolivo-Dobrovolsky invented the three-phase cage-rotor induction motor in 1889 and the three-limb transformer in 1890. This type of motor is now used for the vast majority of commercial applications. However, he claimed that Tesla's motor was not practical because of two-phase pulsations, which prompted him to persist in his three-phase work. Although Westinghouse achieved its first practical induction motor in 1892 and developed a line of polyphase 60 hertz induction motors in 1893, these early Westinghouse motors were two-phase motors with wound rotors until B. G. Lamme developed a rotating bar winding rotor. The General Electric Company began developing three-phase induction motors in 1891. By 1896, General Electric and Westinghouse signed a cross-licensing agreement for the bar-winding-rotor design, later called the squirrel-cage rotor. Induction motor improvements flowing from these inventions and innovations were such that a 100 horsepower (HP) induction motor currently has the same mounting dimensions as a 7.5 HP motor in 1897.

For what application was Tesla's motor never used?
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A: unanswerable

Problem: In 1964, CBS established its own UK distribution with the acquisition of Oriole Records. EMI continued to distribute Epic and Okeh label material on the Columbia label in the UK until the distribution deal with EMI expired in 1968 when CBS took over distribution.
What lable was bought by CBS in the UK?
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Answer: Oriole Records.

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Yale University, one of the oldest universities in the United States, is a cultural referent as an institution that produces some of the most elite members of society and its grounds, alumni, and students have been prominently portrayed in fiction and U.S. popular culture. For example, Owen Johnson's novel, Stover at Yale, follows the college career of Dink Stover and Frank Merriwell, the model for all later juvenile sports fiction, plays football, baseball, crew, and track at Yale while solving mysteries and righting wrongs. Yale University also is featured in F. Scott Fitzgerald's novel "The Great Gatsby". The narrator, Nick Carraway, wrote a series of editorials for the Yale News, and Tom Buchanan was "one of the most powerful ends that ever played football" for Yale.
Who read the novel Stover at Yale?
A: unanswerable

Context and question: The actual resistance of the filament is temperature dependent. The cold resistance of tungsten-filament lamps is about 1/15 the hot-filament resistance when the lamp is operating. For example, a 100-watt, 120-volt lamp has a resistance of 144 ohms when lit, but the cold resistance is much lower (about 9.5 ohms). Since incandescent lamps are resistive loads, simple phase-control TRIAC dimmers can be used to control brightness. Electrical contacts may carry a "T" rating symbol indicating that they are designed to control circuits with the high inrush current characteristic of tungsten lamps. For a 100-watt, 120-volt general-service lamp, the current stabilizes in about 0.10 seconds, and the lamp reaches 90% of its full brightness after about 0.13 seconds.
What does not determine the actual resistance of a filament?
Answer: unanswerable

Question: The first part of the campaign went well, with John outmanoeuvring the forces under the command of Prince Louis and retaking the county of Anjou by the end of June. John besieged the castle of Roche-au-Moine, a key stronghold, forcing Louis to give battle against John's larger army. The local Angevin nobles refused to advance with the king; left at something of a disadvantage, John retreated back to La Rochelle. Shortly afterwards, Philip won the hard-fought battle of Bouvines in the north against Otto and John's other allies, bringing an end to John's hopes of retaking Normandy. A peace agreement was signed in which John returned Anjou to Philip and paid the French king compensation; the truce was intended to last for six years. John arrived back in England in October.
Is there an answer to this question: Who refused to advance with the king?

Answer: The local Angevin nobles

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Vaisesika metaphysical premises are founded on a form of atomism, that the reality is composed of four substances (earth, water, air, fire). Each of these four are of two types: atomic (paramanu) and composite. An atom is, according to Vaisesika scholars, that which is indestructible (anitya), indivisible, and has a special kind of dimension, called "small" (anu). A composite, in this philosophy, is defined to be anything which is divisible into atoms. Whatever human beings perceive is composite, while atoms are invisible. The Vaisesikas stated that size, form, truths and everything that human beings experience as a whole is a function of atoms, their number and their spatial arrangements, their guna (quality), karma (activity), samanya (commonness), visesa (particularity) and amavaya (inherence, inseparable connectedness of everything).
How many realities are there?
A:
unanswerable