instruction:
You need to answer a given question containing a blank (_). Your answer must be one of the two objects mentioned in the question, for example "trophy" and "suitcase". Your answer must not contain a word that is not present in the question. Please don't use articles (e.g., the, a) before the answer.
question:
The water got murky after the stone was dropped into it but the _ was before dirty.
answer:
stone


question:
The bowling ball was more grams than the basketball because the _ took up more mass.
answer:
bowling ball


question:
Most teenagers find it easier to start playing a flute than a violin because the _ is a lot harder to tune.
answer:

violin