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:
Who played keyboard on the beatles rooftop concert?

Ex Output:
Billy Preston


Ex Input:
Who played the lead actress role in movie mirror mirror?

Ex Output:
Lily Collins


Ex Input:
What is the name of the string of repetitive dna at the tip of each chromosome in the body?

Ex Output:

telomere