Problem: Gregorian calendar:

Ancient tables provided the sun's mean longitude. Christopher Clavius, the architect of the Gregorian calendar, noted that the tables agreed neither on the time when the sun passed through the vernal equinox nor on the length of the mean tropical year. Tycho Brahe also noticed discrepancies. The Gregorian leap year rule (97 leap years in 400 years) was put forward by Petrus Pitatus of Verona in 1560. He noted that it is consistent with the tropical year of the Alfonsine tables and with the mean tropical year of Copernicus (De revolutionibus) and Reinhold (Prutenic tables). The three mean tropical years in Babylonian sexagesimals as the excess over 365 days (the way they would have been extracted from the tables of mean longitude) were 14,33,9,57 (Alphonsine), 14,33,11,12 (Copernicus) and 14,33,9,24 (Reinhold). All values are the same to two places (14:33) and this is also the mean length of the Gregorian year. Thus Pitatus' solution would have commended itself to the astronomers.

Who solution to discrepancies in the tables was not agreeable to astronomers?
---
A: unanswerable

Problem: Donald Wills Douglas, Sr. built a plant in 1922 at Clover Field (Santa Monica Airport) for the Douglas Aircraft Company. In 1924, four Douglas-built planes took off from Clover Field to attempt the first aerial circumnavigation of the world. Two planes made it back, after having covered 27,553 miles (44,342 km) in 175 days, and were greeted on their return September 23, 1924, by a crowd of 200,000 (generously estimated). The Douglas Company (later McDonnell Douglas) kept facilities in the city until the 1960s.
What company was the structure at Clover Field for?
---
Answer: Douglas Aircraft

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In May 2011, Jane's Addiction vocalist Perry Farrell noted that Queen are currently scouting their once former and current live bassist Chris Chaney to join the band. Farrell stated: "I have to keep Chris away from Queen, who want him and they're not gonna get him unless we're not doing anything. Then they can have him." In the same month, Paul Rodgers stated he may tour with Queen again in the near future. At the 2011 Broadcast Music, Incorporated (BMI) Awards held in London on 4 October, Queen received the BMI Icon Award in recognition for their airplay success in the US. At the 2011 MTV Europe Music Awards on 6 November, Queen received the Global Icon Award, which Katy Perry presented to Brian May. Queen closed the awards ceremony, with Adam Lambert on vocals, performing "The Show Must Go On", "We Will Rock You" and "We Are the Champions". The collaboration garnered a positive response from both fans and critics, resulting in speculation about future projects together.
Which artist performed with Queen at the 2011 MTV Europe Music Awards?
A: Adam Lambert

Context and question: In the 10th century the establishment of churches and monasteries led to the development of stone architecture that elaborated vernacular Roman forms, from which the term "Romanesque" is derived. Where available, Roman brick and stone buildings were recycled for their materials. From the tentative beginnings known as the First Romanesque, the style flourished and spread across Europe in a remarkably homogeneous form. Just before 1000 there was a great wave of building stone churches all over Europe. Romanesque buildings have massive stone walls, openings topped by semi-circular arches, small windows, and, particularly in France, arched stone vaults. The large portal with coloured sculpture in high relief became a central feature of facades, especially in France, and the capitals of columns were often carved with narrative scenes of imaginative monsters and animals. According to art historian C. R. Dodwell, "virtually all the churches in the West were decorated with wall-paintings", of which few survive. Simultaneous with the development in church architecture, the distinctive European form of the castle was developed, and became crucial to politics and warfare.
What feature of Romanesque architecture was especially prevalent in France?
Answer: arched stone vaults

Question: This law is a fundamental principle of physics. As shown rigorously by Noether's theorem, the conservation of energy is a mathematical consequence of translational symmetry of time, a property of most phenomena below the cosmic scale that makes them independent of their locations on the time coordinate. Put differently, yesterday, today, and tomorrow are physically indistinguishable. This is because energy is the quantity which is canonical conjugate to time. This mathematical entanglement of energy and time also results in the uncertainty principle - it is impossible to define the exact amount of energy during any definite time interval. The uncertainty principle should not be confused with energy conservation - rather it provides mathematical limits to which energy can in principle be defined and measured.
Is there an answer to this question: This mathematical entanglement of energy and time results in what?

Answer: the uncertainty principle

Problem: Nintendo Entertainment System:

To differentiate Nintendo's new home platform from the early 1980s' common perception of a troubled and shallow video game market, the company freshened its product nomenclature and positioning, and it established a strict product approval and licensing policy. The overall system was referred to as an "Entertainment System" instead of a "video game system", which was centered upon a machine called a "Control Deck" instead of a "console", and which featured software cartridges called "Game Paks" instead of "video games". The 10NES lockout chip system acted as a lock-and-key coupling of each Game Pak and Control Deck, deterring the copying or production of NES games which had not first achieved Nintendo's licensed approval. The packaging of the launch lineup of NES games bore pictures of a very close representation of the actual onscreen graphics of the game, which were of sufficiently recognizable quality on their own. Symbols on the launch games' packaging clearly indicated the genre of the game, in order to reduce consumer confusion. A 'seal of quality' was printed on all appropriately licensed game and accessory packaging. The initial seal stated, "This seal is your assurance that Nintendo has approved and guaranteed the quality of this product". This text was later changed to "Official Nintendo Seal of Quality".

What was the term used by Nintendo instead of "games?"
---
A:
unanswerable