Input: Computer
The differential analyser, a mechanical analog computer designed to solve differential equations by integration, used wheel-and-disc mechanisms to perform the integration. In 1876 Lord Kelvin had already discussed the possible construction of such calculators, but he had been stymied by the limited output torque of the ball-and-disk integrators. In a differential analyzer, the output of one integrator drove the input of the next integrator, or a graphing output. The torque amplifier was the advance that allowed these machines to work. Starting in the 1920s, Vannevar Bush and others developed mechanical differential analyzers.

What type of mechanisms did the differential analyzer use?
Output: wheel-and-disc

Input: Article: After receiving his J.D. from Boston College Law School, Kerry worked in Massachusetts as an Assistant District Attorney. He served as Lieutenant Governor of Massachusetts under Michael Dukakis from 1983 to 1985 and was elected to the U.S. Senate in 1984 and was sworn in the following January. On the Senate Foreign Relations Committee, he led a series of hearings from 1987 to 1989 which were a precursor to the IranContra affair. Kerry was re-elected to additional terms in 1990, 1996, 2002 and 2008. In 2002, Kerry voted to authorize the President "to use force, if necessary, to disarm Saddam Hussein", but warned that the administration should exhaust its diplomatic avenues before launching war.

Now answer this question: When did Kerry become a Senator?

Output: 1984

Article: The importation of slaves was made illegal in 1792. Governor Robert Patton (18021807) recommended that the company import Chinese labour to supplement the rural workforce. The coolie labourers arrived in 1810, and their numbers reached 600 by 1818. Many were allowed to stay, and their descendents became integrated into the population. An 1814 census recorded 3,507 people on the island.

Question: How many coolie labourers were on the island by 1818?
Ans: 600

Here is a question about this article: The island of Saint Helena has a total area of 122 km2 (47 sq mi), and is composed largely of rugged terrain of volcanic origin (the last volcanic eruptions occurred about 7 million years ago). Coastal areas are covered in volcanic rock and warmer and drier than the centre. The highest point of the island is Diana's Peak at 818 m (2,684 ft). In 1996 it became the island's first national park. Much of the island is covered by New Zealand flax, a legacy of former industry, but there are some original trees augmented by plantations, including those of the Millennium Forest project which was established in 2002 to replant part of the lost Great Wood and is now managed by the Saint Helena National Trust. When the island was discovered, it was covered with unique indigenous vegetation, including a remarkable cabbage tree species. The island's hinterland must have been a dense tropical forest but the coastal areas were probably also quite green. The modern landscape is very different, with widespread bare rock in the lower areas, although inland it is green, mainly due to introduced vegetation. There are no native land mammals, but cattle, cats, dogs, donkeys, goats, mice, rabbits, rats and sheep have been introduced, and native species have been adversely affected as a result. The dramatic change in landscape must be attributed to these introductions. As a result, the string tree (Acalypha rubrinervis) and the St Helena olive (Nesiota elliptica) are now extinct, and many of the other endemic plants are threatened with extinction.
What is the answer to this question: What was formed in 2002 to replant parts of the great wood?
****
So... Millennium Forest project

The problem: Answer a question about this article:
A cappella music was originally used in religious music, especially church music as well as anasheed and zemirot. Gregorian chant is an example of a cappella singing, as is the majority of secular vocal music from the Renaissance. The madrigal, up until its development in the early Baroque into an instrumentally-accompanied form, is also usually in a cappella form. Jewish and Christian music were originally a cappella,[citation needed] and this practice has continued in both of these religions as well as in Islam.
The madrigal became what type of form that prevented it from being accompanied with A cappella?
****
The answer: instrumentally-accompanied

The problem: Answer a question about this article:
A large percentage of experts on the modern Middle East began their training in university departments named for the Near East. Similarly the journals associated with these fields of expertise include the words Near East or Near Eastern. The meaning of Near East in these numerous establishments and publications is Middle East. Expertise on the modern Middle East is almost never mixed or confused with studies of the Ancient Near East, although often "Ancient Near East" is abbreviated to "Near East" without any implication of modern times. For example, "Near Eastern Languages" in the ancient sense includes such languages as Sumerian and Akkadian. In the modern sense, it is likely to mean any or all of the Arabic languages.
Where did a large percentage of experts on the modern Middle East began their training?
****
The answer:
university departments named for the Near East