[Q]: Sentence: The Portuguese in Guinea were largely restricted to the port of Bissau and Cacheu. Question: When did the Portuguese first set up trading posts in Guinea-Bissau?
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[A]: no

[Q]: Sentence: Body fossils going back to the mid Ordovician, from 472 to 461 million years ago, have been tentatively classified as oligochaetes, but these identifications are uncertain and some have been disputed. Question: When were the earliest annelid fossils found?
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[A]: yes

[Q]: Sentence: Though the drug was never approved in the USA, the firm distributed Kevadon to over 1,000 physicians there under the guise of investigational use. Question: In what year was thalidomide banned in Germany?
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[A]:
no