Problem: Hard rock:

The roots of hard rock can be traced back to the 1950s, particularly electric blues, which laid the foundations for key elements such as a rough declamatory vocal style, heavy guitar riffs, string-bending blues-scale guitar solos, strong beat, thick riff-laden texture, and posturing performances. Electric blues guitarists began experimenting with hard rock elements such as driving rhythms, distorted guitar solos and power chords in the 1950s, evident in the work of Memphis blues guitarists such as Joe Hill Louis, Willie Johnson, and particularly Pat Hare, who captured a "grittier, nastier, more ferocious electric guitar sound" on records such as James Cotton's "Cotton Crop Blues" (1954). Other antecedents include Link Wray's instrumental "Rumble" in 1958, and the surf rock instrumentals of Dick Dale, such as "Let's Go Trippin'" (1961) and "Misirlou" (1962).

What city's blues style produced hard rock precursors in electric blues?
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A: Memphis

Problem: In Greece, there are 2 "Polytechnics" part of the public higher education in Greece and they confer a 5-year Diplom Uni (300E.C.T.S I.S.C.E.D. 5A), the National Technical University of Athens and the Technical University of Crete. Also, there are Greek Higher Technological Educational Institutes ( .T.E.I). After the N.1404/1983 Higher Education Reform Act (.1404/1983 - 2916/2001 - . 3549/2007 - N. 3685/2008 - N. 4009/2011) the Technological Educational Institute constitute, a parallel and equivalent with universities part of the public higher education in Greece. They confer 4-year bachelor's degree (Diplom FH) (240E.C.T.S I.S.C.E.D. 5A).
What's the name of the Act that changed how Greek public institutes of technology were designated?
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Answer: Higher Education Reform Act

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Women were expected to obey the will of their father, then their husband, and then their adult son in old age. However, it is known from contemporary sources that there were many deviations to this rule, especially in regard to mothers over their sons, and empresses who ordered around and openly humiliated their fathers and brothers. Women were exempt from the annual corvee labor duties, but often engaged in a range of income-earning occupations aside from their domestic chores of cooking and cleaning.
Who were women obligated to obey in their old age?
A: their adult son

Context and question: By the end of the early modern period, the structure and orientation of higher education had changed in ways that are eminently recognizable for the modern context. Aristotle was no longer a force providing the epistemological and methodological focus for universities and a more mechanistic orientation was emerging. The hierarchical place of theological knowledge had for the most part been displaced and the humanities had become a fixture, and a new openness was beginning to take hold in the construction and dissemination of knowledge that were to become imperative for the formation of the modern state.
The study of the humanities at the end of the modern state replaced the work of what individual?
Answer: unanswerable

Question: Many mechanical aids to calculation and measurement were constructed for astronomical and navigation use. The planisphere was a star chart invented by Abu Rayhan al-Biruni in the early 11th century. The astrolabe was invented in the Hellenistic world in either the 1st or 2nd centuries BC and is often attributed to Hipparchus. A combination of the planisphere and dioptra, the astrolabe was effectively an analog computer capable of working out several different kinds of problems in spherical astronomy. An astrolabe incorporating a mechanical calendar computer and gear-wheels was invented by Abi Bakr of Isfahan, Persia in 1235. Abu Rayhan al-Biruni invented the first mechanical geared lunisolar calendar astrolabe, an early fixed-wired knowledge processing machine with a gear train and gear-wheels, circa 1000 AD.
Is there an answer to this question: The first astrolabe with gear-wheels was invented when?

Answer: 1235

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In 2007, two FAA whistleblowers, inspectors Charalambe "Bobby" Boutris and Douglas E. Peters, alleged that Boutris said he attempted to ground Southwest after finding cracks in the fuselage, but was prevented by supervisors he said were friendly with the airline. This was validated by a report by the Department of Transportation which found FAA managers had allowed Southwest Airlines to fly 46 airplanes in 2006 and 2007 that were overdue for safety inspections, ignoring concerns raised by inspectors. Audits of other airlines resulted in two airlines grounding hundreds of planes, causing thousands of flight cancellations. The House Transportation and Infrastructure Committee held hearings in April 2008. Jim Oberstar, former chairman of the committee said its investigation uncovered a pattern of regulatory abuse and widespread regulatory lapses, allowing 117 aircraft to be operated commercially although not in compliance with FAA safety rules. Oberstar said there was a "culture of coziness" between senior FAA officials and the airlines and "a systematic breakdown" in the FAA's culture that resulted in "malfeasance, bordering on corruption." In 2008 the FAA proposed to fine Southwest $10.2 million for failing to inspect older planes for cracks, and in 2009 Southwest and the FAA agreed that Southwest would pay a $7.5 million penalty and would adopt new safety procedures, with the fine doubling if Southwest failed to follow through.
When did two whisleblowers allege that Boutris attempted to ground Southwest Airlines?
A:
2007