[Q]: Sentence: Although a recommendation of the First Council of Nicaea in 325 specified that all Christians should celebrate Easter on the same day, it took almost five centuries before virtually all Christians achieved that objective by adopting the rules of the Church of Alexandria (see Easter for the issues which arose). Question: When did the First Council of Nicaea rule that Easter be celebrated by all Christians?
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[A]: yes

[Q]: Sentence: For instance, when a typical dot matrix computer printer starts up, its controller makes the print head stepper motor drive to its left-hand limit, where a position sensor defines home position and stops stepping. Question: How do servo motors differ from stepper motors?
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[A]: no

[Q]: Sentence: Brain tissue in its natural state is too soft to work with, but it can be hardened by immersion in alcohol or other fixatives, and then sliced apart for examination of the interior. Question: Brain tissue is naturally soft, but can be stiffened with what liquid?
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[A]:
yes