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:
I used a battery to take pictures with the camera and put them in an album until the _ needed charging.
answer:
battery


question:
The engineer created robots to replace the algorithms at solving the puzzle. The _ were more advanced.
answer:
robots


question:
John thought the Corvette was beautiful but the Camero was not. John did not purchase the _ .
answer:

Camero