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.

Who voiced king louie in the original jungle book?
Louis Leo Prima

When was the song you're so vain written?
1971

When was the first phineas and ferb episode made?

August 17, 2007