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:
As the gas filled the room, most people opted for the mask instead of the bag since the _ was efficient.
answer:
mask


question:
John tried to listen to the radio during the concert, but he couldn't hear the radio because the _ was too loud.
answer:
concert


question:
The passport expired last week and he didn't have an updated picture to renew it, because the _ couldn't identify him.
answer:

picture