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:
Billy wanted to prevent having his radiator overheat in the desert sun so he added water but the _ was too little.
answer:
water


question:
The tiny boat was tossed about in the angry sea by gale force winds trying to get back to shore, but the _ engine was just too weak.
answer:

boat