Problem: Time:

While the Big Bang model is well established in cosmology, it is likely to be refined in the future. Little is known about the earliest moments of the universe's history. The Penrose–Hawking singularity theorems require the existence of a singularity at the beginning of cosmic time. However, these theorems assume that general relativity is correct, but general relativity must break down before the universe reaches the Planck temperature, and a correct treatment of quantum gravity may avoid the singularity.

What does the Planck temperature require the existence of?
---
A: unanswerable


Problem: On February 7, 1987, dozens of political prisoners were freed in the first group release since Khrushchev's "thaw" in the mid-1950s. On May 6, 1987, Pamyat, a Russian nationalist group, held an unsanctioned demonstration in Moscow. The authorities did not break up the demonstration and even kept traffic out of the demonstrators' way while they marched to an impromptu meeting with Boris Yeltsin, head of the Moscow Communist Party and at the time one of Gorbachev's closest allies. On July 25, 1987, 300 Crimean Tatars staged a noisy demonstration near the Kremlin Wall for several hours, calling for the right to return to their homeland, from which they were deported in 1944; police and soldiers merely looked on.
Who demonstrated close to the Kremlin in July of 1978?
---
Answer: Crimean Tatars


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The documentation regarding Raciborz and Albert's tenure is the earliest surviving of the use of the clan name and cry defining the honorable status of Polish knights. The names of knightly genealogiae only came to be associated with heraldic devices later in the Middle Ages and in the early modern period. The Polish clan name and cry ritualized the ius militare, i.e., the power to command an army; and they had been used some time before 1244 to define knightly status. (Górecki 1992, pp. 183–185).
WHat is the earliest surviving use of the clan name of the polish knights?
A: documentation regarding Raciborz and Albert's tenure


Context and question: In 1999, Estonia experienced its worst year economically since it regained independence in 1991, largely because of the impact of the 1998 Russian financial crisis.[citation needed] Estonia joined the WTO in November 1999. With assistance from the European Union, the World Bank and the Nordic Investment Bank, Estonia completed most of its preparations for European Union membership by the end of 2002 and now has one of the strongest economies of the new member states of the European Union.[citation needed] Estonia joined the OECD in 2010.
When did Estonia unite with the WTO?
Answer: November 1999


Question: Montana has been a destination for its world-class trout fisheries since the 1930s. Fly fishing for several species of native and introduced trout in rivers and lakes is popular for both residents and tourists throughout the state. Montana is the home of the Federation of Fly Fishers and hosts many of the organizations annual conclaves. The state has robust recreational lake trout and kokanee salmon fisheries in the west, walleye can be found in many parts of the state, while northern pike, smallmouth and largemouth bass fisheries as well as catfish and paddlefish can be found in the waters of eastern Montana. Robert Redford's 1992 film of Norman Mclean's novel, A River Runs Through It, was filmed in Montana and brought national attention to fly fishing and the state.
Is there an answer to this question: Since when has Montana been a destination for trout fisheries?

Answer: 1930s


QUES: The consolidation of the "hot AC" format contrasted with the near-demise of most other AC formats: Beginning with the 2005-2007 economic downturn and eventual recession most stations went for the more chart-based CHR, along with the top 40, urban and even Latino formats. Diminishing physical record sales also proved a major blow to the AC genre.

What AC format is still viable?
What is the answer?
ANS:
hot AC