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 Q]: Where does the ulna articulate with the humerus?
[EX A]: semilunar notch

[EX Q]: Who sings the theme song from phineas and ferb?
[EX A]: Bowling for Soup

[EX Q]: When do kittens open their eyes for the first time?
[EX A]:
seven to ten days after birth