Problem: Washington University in St. Louis:

Washington University spent its first half century in downtown St. Louis bounded by Washington Ave., Lucas Place, and Locust Street. By the 1890s, owing to the dramatic expansion of the Manual School and a new benefactor in Robert Brookings, the University began to move west. The University Board of Directors began a process to find suitable ground and hired the landscape architecture firm Olmsted, Olmsted & Eliot of Boston. A committee of Robert S. Brookings, Henry Ware Eliot, and William Huse found a site of 103 acres (41.7 ha) just beyond Forest Park, located west of the city limits in St. Louis County. The elevation of the land was thought to resemble the Acropolis and inspired the nickname of "Hilltop" campus, renamed the Danforth campus in 2006 to honor former chancellor William H. Danforth.

When did Washington University begin to expand west?
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A: the 1890s

Problem: The MP3 lossy audio data compression algorithm takes advantage of a perceptual limitation of human hearing called auditory masking. In 1894, the American physicist Alfred M. Mayer reported that a tone could be rendered inaudible by another tone of lower frequency. In 1959, Richard Ehmer described a complete set of auditory curves regarding this phenomenon. Ernst Terhardt et al. created an algorithm describing auditory masking with high accuracy. This work added to a variety of reports from authors dating back to Fletcher, and to the work that initially determined critical ratios and critical bandwidths.
Who was the physicist to report that a tone could be rendered inaudible.
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Answer: Alfred M. Mayer

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
United States v. LaMacchia 871 F.Supp. 535 (1994) was a case decided by the United States District Court for the District of Massachusetts which ruled that, under the copyright and cybercrime laws effective at the time, committing copyright infringement for non-commercial motives could not be prosecuted under criminal copyright law. The ruling gave rise to what became known as the "LaMacchia Loophole," wherein criminal charges of fraud or copyright infringement would be dismissed under current legal standards, so long as there was no profit motive involved.
What loophole did the ruling give rise to?
A: LaMacchia Loophole

Context and question: In the last two decades of the 18th century, the theory of polygenism, the belief that different races had evolved separately in each continent and shared no common ancestor, was advocated in England by historian Edward Long and anatomist Charles White, in Germany by ethnographers Christoph Meiners and Georg Forster, and in France by Julien-Joseph Virey. In the US, Samuel George Morton, Josiah Nott and Louis Agassiz promoted this theory in the mid-nineteenth century. Polygenism was popular and most widespread in the 19th century, culminating in the founding of the Anthropological Society of London (1863) during the period of the American Civil War, in opposition to the Ethnological Society, which had abolitionist sympathies.
In what century was polygenism most widespread?
Answer: 19th century

Question: Stars, planets, and moons keep their atmospheres by gravitational attraction, and as such, atmospheres have no clearly delineated boundary: the density of atmospheric gas simply decreases with distance from the object. The Earth's atmospheric pressure drops to about 6998320000000000000♠️3.2102 Pa at 100 kilometres (62 mi) of altitude, the Karman line, which is a common definition of the boundary with outer space. Beyond this line, isotropic gas pressure rapidly becomes insignificant when compared to radiation pressure from the Sun and the dynamic pressure of the solar winds, so the definition of pressure becomes difficult to interpret. The thermosphere in this range has large gradients of pressure, temperature and composition, and varies greatly due to space weather. Astrophysicists prefer to use number density to describe these environments, in units of particles per cubic centimetre.
Is there an answer to this question: What do astrophysicists use to describe sun radiation?

Answer: unanswerable

Problem: Israel:

The Israel Defense Forces is the sole military wing of the Israeli security forces, and is headed by its Chief of General Staff, the Ramatkal, subordinate to the Cabinet. The IDF consist of the army, air force and navy. It was founded during the 1948 ArabIsraeli War by consolidating paramilitary organizationschiefly the Haganahthat preceded the establishment of the state. The IDF also draws upon the resources of the Military Intelligence Directorate (Aman), which works with Mossad and Shabak. The Israel Defense Forces have been involved in several major wars and border conflicts in its short history, making it one of the most battle-trained armed forces in the world.

When was the IDF founded?
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A:
1948