Problem:Context: The Super Bowl 50 Halftime Show took place on February 7, 2016, at Levi's Stadium in Santa Clara, California as part of Super Bowl 50. It was headlined by the British rock group Coldplay with special guest performers Beyonce and Bruno Mars, who previously had headlined the Super Bowl XLVII and Super Bowl XLVIII halftime shows, respectively.

Question: who is singing at half time super bowl 2015?
Solution:OK... To answer this question, we should know that: It was headlined by the British rock group Coldplay with special guest performers Beyonce and Bruno Mars, who previously had headlined the Super Bowl XLVII and Super Bowl XLVIII halftime shows, respectively.
the British rock group Coldplay with special guest performers Beyonce and Bruno Mars.

Student A:The fifth-wheel coupling provides the link between a semi-trailer and the towing truck, tractor unit, leading trailer or dolly. Some camper trailers use a fifth-wheel configuration, requiring the coupling to be installed in the bed of a pickup truck as a towing vehicle, and "fifth wheel" is therefore sometimes used as a synonym for such campers in North America. The coupling consists of a kingpin, a 2-or-3 -inch-diameter (50.8 or 88.9 mm) vertical steel pin protruding from the bottom of the front of the semi-trailer, and a horseshoe-shaped coupling device called a fifth wheel on the rear of the towing vehicle.

Why is it called a 5th wheel trailer?
Student B:OK... The relevant sentence in the passage is: Some camper trailers use a fifth-wheel configuration, requiring the coupling to be installed in the bed of a pickup truck as a towing vehicle, and "fifth wheel" is therefore sometimes used as a synonym for such campers in North America.
Some camper trailers use a fifth - wheel configuration , requiring the coupling to be installed in the bed of a pickup truck as a towing vehicle.

Problem:Commercial refrigerator and freezer units, which go by many other names, were in use for almost 40 years prior to the common home models. They used gas systems such as ammonia (R-717) or sulfur dioxide (R-764), which occasionally leaked, making them unsafe for home use. Practical household refrigerators were introduced in 1915 and gained wider acceptance in the United States in the 1930s as prices fell and non-toxic, non-flammable synthetic refrigerants such as Freon-12 (R-12) were introduced. However, R-12 damaged the ozone layer, causing governments to issue a ban on its use in new refrigerators and air-conditioning systems in 1994. The less harmful replacement for R-12, R-134a (tetrafluoroethane), has been in common use since 1990, but R-12 is still found in many old systems today.

Answer this question: what kind of freon is in a refrigerator?
Solution:OK... To answer the above question, the relevant sentence is: The less harmful replacement for R-12, R-134a (tetrafluoroethane), has been in common use since 1990, but R-12 is still found in many old systems today.
R - 134a ( tetrafluoroethane ) , has been in common use since 1990 , but R - 12 is still found in many old systems today.

Student A:Ys (, Isu, IPA: ( is) ) (/ is /) is a series of Japanese role-playing video games produced by Nihon Falcom. The first game in the series, Ys I: Ancient Ys Vanished, was released on the NEC PC-8801 in 1987. Ys is considered to be the company's flagship franchise.

Based on this passage, when did the first ys game come out?
Student B:OK... The relevant information to answer the above question is: The first game in the series, Ys I: Ancient Ys Vanished, was released on the NEC PC-8801 in 1987.
1987.

Problem:Stand by Me is a 1986 American coming-of-age comedy-drama film directed by Rob Reiner and starring Wil Wheaton, River Phoenix, Corey Feldman, and Jerry O'Connell. The film, whose plot is based on Stephen King's novella The Body (1982) and title is derived from Ben E. King's eponymous song, which plays over the ending credits, tells the story of four boys in a small town in Oregon who go on a hike to find the dead body of a missing child.

When was the movie stand by me made?
Solution:OK... The relevant information to answer the above question is: Stand by Me is a 1986 American coming-of-age comedy-drama film directed by Rob Reiner and starring Wil Wheaton, River Phoenix, Corey Feldman, and Jerry O'Connell.
1986.

Problem:"Last Kiss" is a song released by Wayne Cochran in 1961 on the Gala label. It failed to do well on the charts. Cochran subsequently re-recorded his song for the King label in 1963. It was later revived by J. Frank Wilson and the Cavaliers, Pearl Jam and several international artists, including the Canadian group Wednesday, with varying degrees of success. The song was one of several teen tragedy songs from that period. The song's opening lyrics mirror the opening lyrics of Septimus Winner's "Der Deitcher's Dog".

Based on this passage, who sang the original song the last kiss?
Solution:
OK... To answer the question, consider the following: "Last Kiss" is a song released by Wayne Cochran in 1961 on the Gala label.
Wayne Cochran.