Based on the clue 'a piano of this type that required insertion of a ...', what is the answer?

Based on the clue 'a physics prize went to robert matthews for demons...', what is the answer? Based on the clue 'a pianist could tell you this is the number of day...', what is the answer? Based on the clue 'a piano built by anton walter played by mozart is...', what is the answer? Based on the clue 'a piano has 52 white keys this many black keys', what is the answer? Based on the clue 'a picador is the mounted assistant to this a synon...', what is the answer? Based on the clue 'a pickadil was the framework used to support a ruf...', what is the answer? Based on the clue 'a picnic with rasputin is the opening scene of the...', what is the answer? Based on the clue 'a picture at dr kings funeral made ebonys moneta s...', what is the answer?