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: When does crossing over occur in prophase 1?

SOLUTION: pachytene stage

PROBLEM: When did the astros move to the american league?

SOLUTION: 2013

PROBLEM: India's first international stock exchange has been launched recently in which city?

SOLUTION:
Gujarat International Finance Tec-City, Gandhinagar, Gujarat, India