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:
We cannot see the coin at the base of the pool but we can see it at the base of the drum. The _  is shallow.
answer:
drum


question:
The doctor offered both herbs and pills to help with the pain, but the _ didn't work.
answer:
pills


question:
The fire had gone out in the engine but continued to burn in the trunk since the energy in the _ was plentiful .
answer:

trunk