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 did plasma become a state of matter?
When did plasma become discovered as a new state of matter? 
 1879

Where does eastern time zone change to central?
Where in the midwest does the eastern time zone change to central? 
 Midway through Kentucky and Tennessee

When was the last time the saints played in london?

When was the last time the saints played in london before 2018? 
 October 1 2017