Problem: Affirmative action in the United States:

FDR's New Deal programs often contained equal opportunity clauses stating "no discrimination shall be made on account of race, color or creed",:11 but the true forerunner to affirmative action was the Interior Secretary of the time, Harold L. Ickes. Ickes prohibited discrimination in hiring for Public Works Administration funded projects and oversaw not only the institution of a quota system, where contractors were required to employ a fixed percentage of Black workers, by Robert C. Weaver and Clark Foreman,:12 but also the equal pay of women proposed by Harry Hopkins.:14FDR's largest contribution to affirmative action, however, lay in his Executive Order 8802 which prohibited discrimination in the defense industry or government.:22 The executive order promoted the idea that if taxpayer funds were accepted through a government contract, then all taxpayers should have an equal opportunity to work through the contractor.:23–4 To enforce this idea, Roosevelt created the Fair Employment Practices Committee (FEPC) with the power to investigate hiring practices by government contractors.:22

 What position of power did Clark L. Ickes hold?
---
A: unanswerable


Problem: Predation:

While successful predation results in a gain of energy, hunting invariably involves energetic costs as well. When hunger is not an issue, in general most predators will not seek to attack prey since the costs outweigh the benefits. For instance, a large predatory fish like a shark that is well fed in an aquarium will typically ignore the smaller fish swimming around it (while the prey fish take advantage of the fact that the apex predator is apparently uninterested). Surplus killing represents a deviation from this type of behaviour. The treatment of consumption in terms of cost-benefit analysis is known as optimal foraging theory, and has been quite successful in the study of animal behavior. In general, costs and benefits are considered in energy gain per unit time, though other factors are also important, such as essential nutrients that have no caloric value but are necessary for survival and health.

What makes predation successful?
---
A: gain of energy


Problem: Umayyad Caliphate:

Around 746, Abu Muslim assumed leadership of the Hashimiyya in Khurasan. In 747, he successfully initiated an open revolt against Umayyad rule, which was carried out under the sign of the black flag. He soon established control of Khurasan, expelling its Umayyad governor, Nasr ibn Sayyar, and dispatched an army westwards. Kufa fell to the Hashimiyya in 749, the last Umayyad stronghold in Iraq, Wasit, was placed under siege, and in November of the same year Abu al-Abbas was recognized as the new caliph in the mosque at Kufa.[citation needed] At this point Marwan mobilized his troops from Harran and advanced toward Iraq. In January 750 the two forces met in the Battle of the Zab, and the Umayyads were defeated. Damascus fell to the Abbasids in April, and in August, Marwan was killed in Egypt.

What was the first Umayyad stronghold in Iraq?
---
A: unanswerable


Problem: Computer:

Colossus was the world's first electronic digital programmable computer. It used a large number of valves (vacuum tubes). It had paper-tape input and was capable of being configured to perform a variety of boolean logical operations on its data, but it was not Turing-complete. Nine Mk II Colossi were built (The Mk I was converted to a Mk II making ten machines in total). Colossus Mark I contained 1500 thermionic valves (tubes), but Mark II with 2400 valves, was both 5 times faster and simpler to operate than Mark 1, greatly speeding the decoding process.

How many tubes did Colossus Mark II contain?
---
A:
2400