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.

Where does the ulna articulate with the humerus?
semilunar notch

When did united last win the champions league?
21 May 2008

Who won the laureus 2017 sportman of the year award?

Usain St Leo Bolt