Problem: Beyonce:

Beyonce and husband Jay Z are friends with President Barack Obama and First Lady Michelle Obama. She performed "America the Beautiful" at the 2009 presidential inauguration, as well as "At Last" during the first inaugural dance at the Neighborhood Ball two days later. Beyonce and Jay Z held a fundraiser at the latter's 40/40 Club in Manhattan for Obama's 2012 presidential campaign which raised $4 million. Beyonce uploaded pictures of her paper ballot on Tumblr, confirming she had voted in support for the Democratic Party and to encourage others to do so. She also performed the American national anthem at his second inauguration, singing along with a pre-recorded track. She publicly endorsed same sex marriage on March 26, 2013, after the Supreme Court debate on California's Proposition 8. In July 2013, Beyonce and Jay-Z attended a rally in response to the acquittal of George Zimmerman for the shooting of Trayvon Martin.

What did they attend in July 2013?
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A: a rally

Problem: Solar radiation is absorbed by the Earth's land surface, oceans which cover about 71% of the globe and atmosphere. Warm air containing evaporated water from the oceans rises, causing atmospheric circulation or convection. When the air reaches a high altitude, where the temperature is low, water vapor condenses into clouds, which rain onto the Earth's surface, completing the water cycle. The latent heat of water condensation amplifies convection, producing atmospheric phenomena such as wind, cyclones and anti-cyclones. Sunlight absorbed by the oceans and land masses keeps the surface at an average temperature of 14 C. By photosynthesis green plants convert solar energy into chemically stored energy, which produces food, wood and the biomass from which fossil fuels are derived.
What is the process by which green plants convert solar energy to stored energy?
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Answer: photosynthesis

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
On May 16 China stated it had also received $457 million in donated money and goods for rescue efforts so far, including $83 million from 19 countries and four international organizations. Saudi Arabia was the largest aid donor to China, providing close to 40,000,000 in financial assistance, and an additional 8,000,000 worth of relief materials.
What country was the largest aid donor to China?
A: Saudi Arabia

Context and question: In addition to these popular examples of house, there has also been a reunification of contemporary house and its roots. Many hip hop and R&B artists also turn to house music to add a mass appeal to the music they produce.
Who turns to country music?
Answer: unanswerable

Question: Most beers are cleared of yeast by filtering when packaged in bottles and cans. However, bottle conditioned beers retain some yeasteither by being unfiltered, or by being filtered and then reseeded with fresh yeast. It is usually recommended that the beer be poured slowly, leaving any yeast sediment at the bottom of the bottle. However, some drinkers prefer to pour in the yeast; this practice is customary with wheat beers. Typically, when serving a hefeweizen wheat beer, 90% of the contents are poured, and the remainder is swirled to suspend the sediment before pouring it into the glass. Alternatively, the bottle may be inverted prior to opening. Glass bottles are always used for bottle conditioned beers.
Is there an answer to this question: What kind of containers are used for bottle conditioned beers?

Answer: Glass bottles

The Period of Division from, A.D., 1138 A.D., 1314, which included nearly 200 years of feudal fragmentation and which stemmed from Bolesaw III's division of Poland among his sons, was the genesis of the social structure which saw the economic elevation of the great landowning feudal nobles (mozni/Magnates, both ecclesiastical and lay) from the rycerstwo they originated from. The prior social structure was one of Polish tribes united into the historic Polish nation under a state ruled by the Piast dynasty, this dynasty appearing circa 850 A.D.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): WHen was the period of Division?
Ah, so..
A.D., 1138 A.D., 1314