[Q]: Sentence: Wallerstein, who was promoted at the end of 1947 from president to chairman of the record company, restored Columbia's status as a leading record company and spearheaded the successful introduction of the long playing (LP) record before he retired as Columbia's chairman in 1951. Question: Who was the head of CBS at the time?
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[A]: no

[Q]: Sentence: Some have survived to the present day; others have disappeared, only to be recreated in order to perform music of the period on authentic instruments. Question: What has disappeared, then been recreated in order to perform music of the period?
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[A]: yes

[Q]: Sentence: The letter wynn is usually replaced with w, but sc, eth and thorn are normally retained (except when eth is replaced by thorn). Question: When eth is replaced, what is it replaced by?
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[A]:
yes