TASK DEFINITION: In this task, you're given an open-domain question. Your task is to provide an answer to the given question. There is only one unique answer for each question. Your answer should be short, and refer to an entity, date, number, etc. Do not put your answer in the context of a sentence.
PROBLEM: Who sang these boots were made for walking first?

SOLUTION: Nancy Sinatra

PROBLEM: When does crossing over occur in prophase 1?

SOLUTION: pachytene stage

PROBLEM: The substance that dissolves particles in a solution is called?

SOLUTION:
solvent