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 battery ran out slower on the phone than the iPad because the _ was older.
answer:
iPad


question:
Mary was unsure if the spot on the couch was from the pen or marker, then she realized it couldn't be the _ because the cap was on.
answer:
marker


question:
The thermostat showed that it was twenty degrees cooler downstairs than it was upstairs, so Byron stayed in the _ because he was cold.
answer:

upstairs