In this task, you're given an ambiguous question (which can be answered in more than one way). Your task is to provide one question which clarifies the input question and it has one unique answer, and also provide an answer to the generated question. Generated question and answer should be separated with a new line.

Who wrote the song if i were a rich man?
Who is primarily credited with composing the music to the song if i were a rich man? 
 Jerrold Lewis "Jerry" Bock

When do the new dr who episodes start?
When do the new dr who episodes in series 10 start? 
 15 April 2017

Who won the battle of iwo jima ww2?

Which country won the battle of iwo jima ww2? 
 United States