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.

When was the chicken pox vaccine first given?
When did the Chicken Pox vaccine become commercially available? 
 1984

How many teams in the english premier league?
How many teams in the english premier league at a single time? 
 20 clubs

When does season 3 star vs the forces of evil come out?

When does season 3 star vs the forces of evil start airing? 
 July 15, 2017