Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Hunting and gathering was presumably the subsistence strategy employed by human societies beginning some 1.8 million years ago, by Homo erectus, and from its appearance some 0.2 million years ago by Homo sapiens. It remained the only mode of subsistence until the end of the Mesolithic period some 10,000 years ago, and after this was replaced only gradually with the spread of the Neolithic Revolution.
What was replaced only gradually with the spread of the Mesolithic Revolution?
A: unanswerable

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The race was the most expensive for Congress in the country that year and four days before the general election, Durkin withdrew and endorsed Cronin, hoping to see Kerry defeated. The week before, a poll had put Kerry 10 points ahead of Cronin, with Dukin on 13%. In the final days of the campaign, Kerry sensed that it was "slipping away" and Cronin emerged victorious by 110,970 votes (53.45%) to Kerry's 92,847 (44.72%). After his defeat, Kerry lamented in a letter to supporters that "for two solid weeks, [The Sun] called me un-American, New Left antiwar agitator, unpatriotic, and labeled me every other 'un-' and 'anti-' that they could find. It's hard to believe that one newspaper could be so powerful, but they were." He later felt that his failure to respond directly to The Sun's attacks cost him the race.
What did Kerry think cost him the race against Cronin?
A: his failure to respond directly to The Sun's attacks

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
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]
The root cause of dukkha is identified as ignorance of what?
A: true nature of things

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Non-Australian citizens who are Australian permanent residents should be aware that during their stay on Norfolk Island they are "outside of Australia" for the purposes of the Migration Act. This means that not only will they need a still-valid migrant visa or Resident return visa to return from Norfolk Island to the mainland, but also the time spent in Norfolk Island will not be counted for satisfying the residence requirement for obtaining a Resident return visa in the future. On the other hand, as far as Australian nationality law is concerned, Norfolk Island is a part of Australia, and any time spent by an Australian permanent resident on Norfolk Island will count as time spent in Australia for the purpose of applying for Australian citizenship.
What Act declares Non-Australian residents "inside of Australia" while they are on Norfolk Island?
A:
unanswerable