[Q]: Sentence: Darwin experimented on the movements of plant shoots and roots towards light and gravity, and concluded "It is hardly an exaggeration to say that the tip of the radicle . . Question: Why did Darwin feel plants had something comparable to a brain?
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[A]: yes

[Q]: Sentence: By moving the latter two, who were Ba'athists, to Cairo, he neutralized important political figures who had their own ideas about how Syria should be run. Question: In what year did Nasser and Chehab agree to end the Lebanon crisis?
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[A]: no

[Q]: Sentence: Migrating birds navigate using celestial cues from the sun and stars, the earth's magnetic field, and probably also mental maps. Question: How do migrating birds navigate?
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[A]:
yes