instruction:
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.
question:
How many episodes are in sherlock holmes season 1?
answer:
How many episodes are in series 1 of sherlock, the 2010 tv show? 
 3


question:
When did rolls royce start making jet engines?
answer:
When did rolls royce start making jet engines for World War II? 
 1940


question:
When did us airways and american airlines merger?
answer:

When did us airways and american airlines begin their merger? 
 December 9, 2013