TASK DEFINITION: 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.
PROBLEM: The bike manufacturer switched its fabrication from steel to aluminium frames because the _ was lighter.

SOLUTION: aluminium

PROBLEM: Preston liked learning violin better than piano at music class, because the _ hurt his back.

SOLUTION: piano

PROBLEM: I cut my chin and went to the ER unsure if they would give me stitches or glue. The cut was so big that it needed the _ .

SOLUTION:
stitches