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 was the first person to use fossils for dating rock layers?
[EX A]: Who was the first person to use fossils for dating rock layers theoretically? 
 Nicolaus Stenonius

[EX Q]: Who played drusilla on the young and the restless?
[EX A]: Who played drucilla on the young and the restless from 1990-2007? 
 Victoria Lynn Rowell

[EX Q]: When does the flash season 4 episode 9 come out?
[EX A]:
When does the flash season 4 episode 9 come out on TV? 
 December 5, 2017