instruction:
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.
question:
What size bullet does an ak 47 shoot?
answer:
7.62 caliber 39mm rounds


question:
Where does the ulna articulate with the humerus?
answer:
semilunar notch


question:
When did sachin tendulkar win the world cup?
answer:

2011