Question: "How long have the dialects been studied?" Context: "The Philadelphia dialect, which is spread throughout the Delaware Valley and South Jersey, is part of Mid-Atlantic American English, and as such it is identical in many ways to the Baltimore dialect. Unlike the Baltimore dialect, however, the Philadelphia accent also shares many similarities with the New York accent. Thanks to over a century of linguistics data collected by researchers at the University of Pennsylvania, the Philadelphia dialect under sociolinguist William Labov has been one of the best-studied forms of American English.[f]" Answer:
Ans: over a century

Question: "At what point in the filming did Newman work on the music?" Context: "Thomas Newman returned as Spectre's composer. Rather than composing the score once the film had moved into post-production, Newman worked during filming. The theatrical trailer released in July 2015 contained a rendition of John Barry's On Her Majesty's Secret Service theme. Mendes revealed that the final film would have more than one hundred minutes of music. The soundtrack album was released on 23 October 2015 in the UK and 6 November 2015 in the USA on the Decca Records label." Answer:
Ans: during

Question: "If the number of remaining Han treatises is one-third of the number of Han Chapters on the Mathematical Art, how many treatises remain?" Context: "Three Han mathematical treatises still exist. These are the Book on Numbers and Computation, the Arithmetical Classic of the Gnomon and the Circular Paths of Heaven and the Nine Chapters on the Mathematical Art. Han-era mathematical achievements include solving problems with right-angle triangles, square roots, cube roots, and matrix methods, finding more accurate approximations for pi, providing mathematical proof of the Pythagorean theorem, use of the decimal fraction, Gaussian elimination to solve linear equations, and continued fractions to find the roots of equations." Answer:
Ans: Three

Question: "What does the elevator use to descend?" Context: "A elevator of this kind uses a vacuum on top of the cab and a valve on the top of the "shaft" to move the cab upwards and closes the valve in order to keep the cab at the same level. a diaphragm or a piston is used as a "brake" if there's a sudden increase in pressure avove the cab. however, to go down, it opens the valve so that the air can pressurize the top of the "shaft", allowing the cab to go down by its own weight. this also means that in case of a power failure, the cab will automatically go down. the "shaft" is made of acrilic, is always round, due to the shape of the vacuum pump turbine. in order to keep the air inside of the cab, rubber seals are used. due to technical limitations, these elevators have a low capacity. they usually allow 1-3 passengers and up to 525 lbs." Answer:
Ans: its own weight