Problem: Eritrea:

The Aksumites erected a number of large stelae, which served a religious purpose in pre-Christian times. One of these granite columns, the obelisk of Aksum, is the largest such structure in the world, standing at 90 feet. Under Ezana (fl. 320–360), Aksum later adopted Christianity. In the 7th century, early Muslims from Mecca also sought refuge from Quraysh persecution by travelling to the kingdom, a journey known in Islamic history as the First Hijra. It is also the alleged resting place of the Ark of the Covenant and the purported home of the Queen of Sheba.

Who eventually adopted Christianity under Ezana?
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A: Aksum


Problem: Life with PlayStation, released on September 18, 2008 to succeed Folding@home, was retired November 6, 2012. Life with PlayStation used virtual globe data to display news and information by city. Along with Folding@home functionality, the application provided access to three other information "channels", the first being the Live Channel offering news headlines and weather which were provided by Google News, The Weather Channel, the University of Wisconsin–Madison Space Science and Engineering Center, among other sources. The second channel was the World Heritage channel which offered historical information about historical sites. The third channel was the United Village channel. United Village was designed to share information about communities and cultures worldwide. An update allowed video and photo viewing in the application. The fourth channel was the USA exclusive PlayStation Network Game Trailers Channel for direct streaming of game trailers.
For weather updates from The Weather Channel, which of Life's channels wouldn't you have visited?
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Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Cities not served by road, sea, or river can be reached only by air, foot, dogsled, or snowmachine, accounting for Alaska's extremely well developed bush air services—an Alaskan novelty. Anchorage and, to a lesser extent Fairbanks, is served by many major airlines. Because of limited highway access, air travel remains the most efficient form of transportation in and out of the state. Anchorage recently completed extensive remodeling and construction at Ted Stevens Anchorage International Airport to help accommodate the upsurge in tourism (in 2012-2013, Alaska received almost 2 million visitors).
Which two cities are unserved by major airlines?
A: unanswerable


Context and question: What drove circadian rhythms to evolve has been an enigmatic question. Previous hypotheses emphasized that photosensitive proteins and circadian rhythms may have originated together in the earliest cells, with the purpose of protecting replicating DNA from high levels of damaging ultraviolet radiation during the daytime. As a result, replication was relegated to the dark. However, evidence for this is lacking, since the simplest organisms with a circadian rhythm, the cyanobacteria, do the opposite of this - they divide more in the daytime. Recent studies instead highlight the importance of co-evolution of redox proteins with circadian oscillators in all three kingdoms of life following the Great Oxidation Event approximately 2.3 billion years ago. The current view is that circadian changes in environmental oxygen levels and the production of reactive oxygen species (ROS) in the presence of daylight are likely to have driven a need to evolve circadian rhythms to preempt, and therefore counteract, damaging redox reactions on a daily basis.
What type of proteins developed as a result of circadian rhythms?
Answer: unanswerable


Question: First recognized in 1900 by Max Planck, it was originally the proportionality constant between the minimal increment of energy, E, of a hypothetical electrically charged oscillator in a cavity that contained black body radiation, and the frequency, f, of its associated electromagnetic wave. In 1905 the value E, the minimal energy increment of a hypothetical oscillator, was theoretically associated by Einstein with a "quantum" or minimal element of the energy of the electromagnetic wave itself. The light quantum behaved in some respects as an electrically neutral particle, as opposed to an electromagnetic wave. It was eventually called the photon.
Is there an answer to this question: When did Max Planck first recognize the value of the Planck constant?

Answer: 1900


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In the past, a certain misconception sometimes led to the mistranslation of "szlachta" as "gentry" rather than "nobility".:206 :xvi This mistaken practice began due to the economic status of some szlachta members being inferior to that of the nobility in other European countries (see also Estates of the Realm regarding wealth and nobility). The szlachta included those almost rich and powerful enough to be magnates down to rascals with a noble lineage, no land, no castle, no money, no village, and no peasants.:xvi
Why did the mistranslation of szlachta come about?
A:
included those almost rich and powerful enough to be magnates down to rascals