Problem: Anti-aircraft warfare:

Throughout the 20th century air defence was one of the fastest-evolving areas of military technology, responding to the evolution of aircraft and exploiting various enabling technologies, particularly radar, guided missiles and computing (initially electromechanical analog computing from the 1930s on, as with equipment described below). Air defence evolution covered the areas of sensors and technical fire control, weapons, and command and control. At the start of the 20th century these were either very primitive or non-existent.

In addition to radar and computing, what else did air defence want to exploit?
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A: guided missiles


Problem: As of 2000[update], there were 67,115 private households in the municipality, and an average of 1.8 persons per household. There were 34,981 households that consist of only one person and 1,592 households with five or more people. In 2000[update], a total of 65,538 apartments (90.6% of the total) were permanently occupied, while 5,352 apartments (7.4%) were seasonally occupied and 1,444 apartments (2.0%) were empty. As of 2009[update], the construction rate of new housing units was 1.2 new units per 1000 residents.
What percent of apartments are seasonal apartments?
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Answer: 7.4%


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Technische Universität (abbreviation: TU) are the common terms for universities of technology or technical university. These institutions can grant habilitation and doctoral degrees and focus on research.
What's the main focus of a Technische Universität?
A: research


Context and question: Anti-aircraft warfare or counter-air defence is defined by NATO as "all measures designed to nullify or reduce the effectiveness of hostile air action." They include ground-and air-based weapon systems, associated sensor systems, command and control arrangements and passive measures (e.g. barrage balloons). It may be used to protect naval, ground, and air forces in any location. However, for most countries the main effort has tended to be 'homeland defence'. NATO refers to airborne air defence as counter-air and naval air defence as anti-aircraft warfare. Missile defence is an extension of air defence as are initiatives to adapt air defence to the task of intercepting any projectile in flight.
Barrage balloons are an example of what type of weapons system?
Answer: passive measures


Question: RIBA is based at 66 Portland Place, London—a 1930s Grade II* listed building designed by architect George Grey Wornum with sculptures by Edward Bainbridge Copnall and James Woodford. Parts of the London building are open to the public, including the Library. It has a large architectural bookshop, a café, restaurant and lecture theatres. Rooms are hired out for events.
Is there an answer to this question: Who designed RIBA's headquarters?

Answer: George Grey Wornum


QUES: Milton Winternitz led the Yale Medical School as its dean from 1920 to 1935. Dedicated to the new scientific medicine established in Germany, he was equally fervent about "social medicine" and the study of humans in their culture and environment. He established the "Yale System" of teaching, with few lectures and fewer exams, and strengthened the full-time faculty system; he also created the graduate-level Yale School of Nursing and the Psychiatry Department, and built numerous new buildings. Progress toward his plans for an Institute of Human Relations, envisioned as a refuge where social scientists would collaborate with biological scientists in a holistic study of humankind, unfortunately lasted for only a few years before the opposition of resentful anti-Semitic colleagues drove him to resign.

What wasn't the driving force behind Milton Winternitz's research?
What is the answer?
ANS:
unanswerable