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.

[EX Q]: Who is the father of emma on friends?
[EX A]: Which character is the father of emma on friends? 
 Ross Geller, Ph.D.

[EX Q]: Who played nathan on young and the restless?
[EX A]: Who played nathan on young and the restless from 1984-92? 
 Nathan Purdee

[EX Q]: When did the third industrial revolution take place?
[EX A]:
When did the Third Industrial Revolution begin? 
 from the late 1950s to the late 1970s