Problem: Incandescent light bulb:

In flood lamps used for photographic lighting, the tradeoff is made in the other direction. Compared to general-service bulbs, for the same power, these bulbs produce far more light, and (more importantly) light at a higher color temperature, at the expense of greatly reduced life (which may be as short as two hours for a type P1 lamp). The upper temperature limit for the filament is the melting point of the metal. Tungsten is the metal with the highest melting point, 3,695 K (6,191 F). A 50-hour-life projection bulb, for instance, is designed to operate only 50 C (122 F) below that melting point. Such a lamp may achieve up to 22 lumens per watt, compared with 17.5 for a 750-hour general service lamp.

What lamp can achieve up to 23 lumens per watt?
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A: unanswerable

Problem: Armenia is member of Collective Security Treaty Organisation (CSTO) along with Belarus, Kazakhstan, Kyrgyzstan, Russia, Tajikistan and Uzbekistan. It participates in NATO's Partnership for Peace (PiP) program and is in a NATO organisation called Euro-Atlantic Partnership Council (EAPC). Armenia has engaged in a peacekeeping mission in Kosovo as part of non-NATO KFOR troops under Greek command. Armenia also had 46 members of its military peacekeeping forces as a part of the Coalition Forces in Iraq War until October 2008.
Who else joins Armenia in the CSTO?
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Answer: Belarus, Kazakhstan, Kyrgyzstan, Russia, Tajikistan and Uzbekistan

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
For Hayek, the supposedly stark difference between authoritarianism and totalitarianism has much importance and Hayek places heavy weight on this distinction in his defence of transitional dictatorship. For example, when Hayek visited Venezuela in May 1981, he was asked to comment on the prevalence of totalitarian regimes in Latin America. In reply, Hayek warned against confusing "totalitarianism with authoritarianism," and said that he was unaware of "any totalitarian governments in Latin America. The only one was Chile under Allende". For Hayek, however, the word 'totalitarian' signifies something very specific: the want to "organize the whole of society" to attain a "definite social goal" which is stark in contrast to "liberalism and individualism".
Hayek believed that authoritarianism was very different from what?
A: totalitarianism

Context and question: In 1358, the Sakya viceregal regime installed by the Mongols in Tibet was overthrown in a rebellion by the Phagmodru myriarch Tai Situ Changchub Gyaltsen (13021364). The Mongol Yuan court was forced to accept him as the new viceroy, and Changchub Gyaltsen and his successors, the Phagmodrupa Dynasty, gained de facto rule over Tibet.
Who placed the Sakya viceregal regime position of authority?
Answer: the Mongols in Tibet

Question: Alaska (i/lsk/) is a U.S. state situated in the northwest extremity of the Americas. The Canadian administrative divisions of British Columbia and Yukon border the state to the east while Russia has a maritime border with the state to the west across the Bering Strait. To the north are the Chukchi and Beaufort Seas, the southern parts of the Arctic Ocean. To the south and southwest is the Pacific Ocean. Alaska is the largest state in the United States by area, the 3rd least populous and the least densely populated of the 50 United States. Approximately half of Alaska's residents (the total estimated at 738,432 by the Census Bureau in 2015) live within the Anchorage metropolitan area. Alaska's economy is dominated by the fishing, natural gas, and oil industries, resources which it has in abundance. Military bases and tourism are also a significant part of the economy.
Is there an answer to this question: How does Alaska compare in size to other US states?

Answer: largest state in the United States by area

Problem: Universal Studios:

Soon, Laemmle and other disgruntled nickelodeon owners decided to avoid paying Edison by producing their own pictures. In June 1909, Laemmle started the Yankee Film Company with partners Abe Stern and Julius Stern. That company quickly evolved into the Independent Moving Pictures Company (IMP), with studios in Fort Lee, New Jersey, where many early films in America's first motion picture industry were produced in the early 20th century. Laemmle broke with Edison's custom of refusing to give billing and screen credits to performers. By naming the movie stars, he attracted many of the leading players of the time, contributing to the creation of the star system. In 1910, he promoted Florence Lawrence, formerly known as "The Biograph Girl", and actor King Baggot, in what may be the first instance of a studio using stars in its marketing.

What was Lawrence Florence known as?
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A:
unanswerable