Problem: 2008 Sichuan earthquake:

The State Council declared a three-day period of national mourning for the quake victims starting from May 19, 2008; the PRC's National Flag and Regional Flags of Hong Kong and Macau Special Administrative Regions flown at half mast. It was the first time that a national mourning period had been declared for something other than the death of a state leader, and many have called it the biggest display of mourning since the death of Mao Zedong. At 14:28 CST on May 19, 2008, a week after the earthquake, the Chinese public held a moment of silence. People stood silent for three minutes while air defense, police and fire sirens, and the horns of vehicles, vessels and trains sounded. Cars and trucks on Beijing's roads also came to a halt. People spontaneously burst into cheering "Zhongguo jiayou!" (Let's go, China!) and "Sichuan jiayou" (Let's go, Sichuan!) afterwards.

How long was the national mourning for the quake victims to last?
---
A: three-day period


Problem: Neither John nor the rebel barons seriously attempted to implement the peace accord. The rebel barons suspected that the proposed baronial council would be unacceptable to John and that he would challenge the legality of the charter; they packed the baronial council with their own hardliners and refused to demobilise their forces or surrender London as agreed. Despite his promises to the contrary, John appealed to Innocent for help, observing that the charter compromised the pope's rights under the 1213 agreement that had appointed him John's feudal lord. Innocent obliged; he declared the charter "not only shameful and demeaning, but illegal and unjust" and excommunicated the rebel barons. The failure of the agreement led rapidly to the First Barons' War.
Who suspected that the proposed baronial council would be unacceptable?
---
Answer: rebel barons


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Animal tissue consists of elements and compounds ingested, digested, absorbed, and circulated through the bloodstream to feed the cells of the body. Except in the unborn fetus, the digestive system is the first system involved[vague]. Digestive juices break chemical bonds in ingested molecules, and modify their conformations and energy states. Though some molecules are absorbed into the bloodstream unchanged, digestive processes release them from the matrix of foods. Unabsorbed matter, along with some waste products of metabolism, is eliminated from the body in the feces.
What is able to break bonds in ingested molecules?
A: Digestive juices


Context and question: The Football Association Premier League Ltd (FAPL) is operated as a corporation and is owned by the 20 member clubs. Each club is a shareholder, with one vote each on issues such as rule changes and contracts. The clubs elect a chairman, chief executive, and board of directors to oversee the daily operations of the league. The current chairman is Sir Dave Richards, who was appointed in April 1999, and the chief executive is Richard Scudamore, appointed in November 1999. The former chairman and chief executive, John Quinton and Peter Leaver, were forced to resign in March 1999 after awarding consultancy contracts to former Sky executives Sam Chisholm and David Chance. The Football Association is not directly involved in the day-to-day operations of the Premier League, but has veto power as a special shareholder during the election of the chairman and chief executive and when new rules are adopted by the league.
For what reason does FAPL select a chairman, chief executive and vice president?
Answer: unanswerable


Question: The New York City Fire Department (FDNY), provides fire protection, technical rescue, primary response to biological, chemical, and radioactive hazards, and emergency medical services for the five boroughs of New York City. The New York City Fire Department is the largest municipal fire department in the United States and the second largest in the world after the Tokyo Fire Department. The FDNY employs approximately 11,080 uniformed firefighters and over 3,300 uniformed EMTs and paramedics. The FDNY's motto is New York's Bravest.
Is there an answer to this question: What city is home to the largest municipal fire department in the world?

Answer: Tokyo


QUES: Beginning with the Paris Exposition of 1878, the instrument's popularity rebounded. The Exposition was one of many stops for a popular new performing group the Estudiantes Españoles (Spanish Students). They danced and played guitars, violins and the bandurria, which became confused with the mandolin. Along with the energy and awareness created by the day's hit sensation, a wave of Italian mandolinists travelled Europe in the 1880s and 1890s and in the United States by the mid-1880s, playing and teaching their instrument. The instrument's popularity continued to increase during the 1890s and mandolin popularity was at its height in "early years of the 20th century." Thousands were taking up the instrument as a pastime, and it became an instrument of society, taken up by young men and women. Mandolin orchestras were formed worldwide, incorporating not only the mandolin family of instruments, but also guitars, double basses and zithers.

 When did the mandolin's poplarity not rebound?
What is the answer?
ANS:
unanswerable