Based on the clue 'a covering for the blade of a knife', what is the answer?

Based on the clue 'a cover by peter paul mary of blowin in the wind ...', what is the answer? What is associated with: a cover titled declining american birthrate was canceled in 1974 when this man was pardoned? Based on the clue 'a cover up if weve ever heard one tom sawyer had o...', what is the answer? Based on the clue 'a covered 2 wheeled carriage whether its good look...', what is the answer? Based on the clue 'a cow a round of cheese an ear of corn the state ...', what is the answer? What is associated with: a cow calling contest was among the events in 1928 at this states first upper peninsula state… Based on the clue 'a cow knocking over a candle or something really e...', what is the answer? Based on the clue 'a coward is said to have a yellow one down his bac...', what is the answer?