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 is known as the father of strategy management?

Ex Output:
Harry Igor Ansoff


Ex Input:
What does the rosenberg self esteem scale measure?

Ex Output:
self-esteem


Ex Input:
Who bought the old american embassy in london?

Ex Output:

Qatari real-estate investment firm