Problem: Modern history:

The Space Age is a period encompassing the activities related to the Space Race, space exploration, space technology, and the cultural developments influenced by these events. The Space Age began with the development of several technologies that culminated with the launch of Sputnik 1 by the Soviet Union. This was the world's first artificial satellite, orbiting the Earth in 98.1 minutes and weighing in at 83 kg. The launch of Sputnik 1 ushered a new era of political, scientific and technological achievements that became known as the Space Age. The Space Age was characterized by rapid development of new technology in a close race mostly between the United States and the Soviet Union. The Space Age brought the first human spaceflight during the Vostok programme and reached its peak with the Apollo program which captured the imagination of much of the world's population. The landing of Apollo 11 was an event watched by over 500 million people around the world and is widely recognized as one of the defining moments of the 20th century. Since then and with the end of the space race due to the dissolution of the Soviet Union, public attention has largely moved to other areas.

How many people watched the Apollo 11 landing?
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A: 500 million

Problem: In 2012 the Paris agglomeration (urban area) counted 28,800 people without a fixed residence, an increase of 84 percent since 2001; it represents 43 percent of the homeless in all of France. Forty-one percent were women, and 29 percent were accompanied by children. Fifty-six percent of the homeless were born outside France, the largest number coming from Africa and Eastern Europe. The city of Paris has sixty homeless shelters, called Centres d'hebergement et de reinsertion sociale or CHRS, which are funded by the city and operated by private charities and associations.
What percentage of homeless people are women?
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Answer: 43

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Another solution to the problem of causality-based temporal paradoxes is that such paradoxes cannot arise simply because they have not arisen. As illustrated in numerous works of fiction, free will either ceases to exist in the past or the outcomes of such decisions are predetermined. As such, it would not be possible to enact the grandfather paradox because it is a historical fact that your grandfather was not killed before his child (your parent) was conceived. This view doesn't simply hold that history is an unchangeable constant, but that any change made by a hypothetical future time traveler would already have happened in his or her past, resulting in the reality that the traveler moves from. More elaboration on this view can be found in the Novikov self-consistency principle.
What principle elaborates more on the view described?
A: the Novikov self-consistency principle.

Context and question: The second truth is that the origin of dukkha can be known. Within the context of the four noble truths, the origin of dukkha is commonly explained as craving (Pali: tanha) conditioned by ignorance (Pali: avijja). On a deeper level, the root cause of dukkha is identified as ignorance (Pali: avijja) of the true nature of things. The third noble truth is that the complete cessation of dukkha is possible, and the fourth noble truth identifies a path to this cessation.[note 7]
What does the second of the Four Noble Truths explain?
Answer: that the origin of dukkha can be known

Question: Over the course of thousands of years, American indigenous peoples domesticated, bred and cultivated a large array of plant species. These species now constitute 5060% of all crops in cultivation worldwide. In certain cases, the indigenous peoples developed entirely new species and strains through artificial selection, as was the case in the domestication and breeding of maize from wild teosinte grasses in the valleys of southern Mexico. Numerous such agricultural products retain their native names in the English and Spanish lexicons.
Is there an answer to this question: How were new species and strains of crops developed?

Answer: artificial selection

On October 21, 1959, Eisenhower approved the transfer of the Army's remaining space-related activities to NASA. On July 1, 1960, the Redstone Arsenal became NASA's George C. Marshall Space Flight Center, with von Braun as its first director. Development of the Saturn rocket family, which when mature, would finally give the US parity with the Soviets in terms of lifting capability, was thus transferred to NASA.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): The Redstone Arsenal became the George C. Marshall Space Flight Center when?
Ah, so..
July 1, 1960