[Q]: Sentence: The timing of migration seems to be controlled primarily by changes in day length. Question: What causes the timing of migration?
++++++++++
[A]: yes

[Q]: Sentence: The tallest dog is a Great Dane that stands 106.7 cm (42.0 in) at the shoulder. Question: What breed was the largest dog known to have lived?
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[A]: no

[Q]: Sentence: The future of projectile based weapons may be found in the railgun. Question: How fast was the shell that the Navy fired from the railgun?
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[A]:
no