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.

Ex Input:
When did jamaica make it to the world cup?

Ex Output:
1998


Ex Input:
Who discovered the center of the milky way galaxy?

Ex Output:
a team of radio astronomers, led by Joseph Lade Pawsey


Ex Input:
How many times have ajax won the european cup?

Ex Output:

four