instruction:
This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.
question:
Passage: 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. Question: For sudden surges in pressure above the cab, what is used as a "brake"?
answer:
a diaphragm or a piston

question:
Passage: Madonna moved in with boyfriend John "Jellybean" Benitez, asking his help for finishing the album's production. Benitez remixed most of the tracks and produced "Holiday", which was her third single and her first global hit. The overall sound of Madonna was dissonant and in the form of upbeat synthetic disco, using some of the new technology of the time, like the Linn drum machine, Moog bass and the OB-X synthesizer. The album was released in July 1983 and peaked at number eight on the Billboard 200 six months later, in 1984. It yielded two more hit singles, "Borderline" and "Lucky Star". Question: Who remixed most of Madonna's album tracks?
answer:
Benitez

question:
Passage: Northwestern's football team has made 73 appearances in the top 10 of the AP poll since 1936 (including 5 at #1) and has won eight Big Ten conference championships since 1903. At one time, Northwestern had the longest losing streak in Division I-A, losing 34 consecutive games between 1979 and 1982. They did not appear in a bowl game after 1949 until the 1996 Rose Bowl. The team did not win a bowl since the 1949 Rose Bowl until the 2013 Gator Bowl. Following the sudden death of football coach Randy Walker in 2006, 31-year-old former All-American Northwestern linebacker Pat Fitzgerald assumed the position, becoming the youngest Division I FBS coach at the time. Question: How many appearances has Northwestern's football team made in the top 10 AP poll since 1936?
answer:
73