Definition: In this task, you will use your knowledge about language (and common sense) to determine what element the marked number refers to. The numbers are marked with two underlines around them, like: _ number _. Your answer should be chosen from the given text, and should not contain other words.
Input: Rip Hunter:  Replacing the Time Masters is an enormous responsibility , Sara , and one which I fear our team is ill - equipped ...
Sara Lance: Gideon
Sara Lance: , are we under attack ?
Gideon: Negative . That was a shockwave generated by a time quake .
Sara Lance: A what ?
Rip Hunter: Uh ... disturbance in the temporal zone caused by an unusually large aberration .
Sara Lance: You never mentioned a time quake before .
Rip Hunter: Never experienced _ one _ before .

quake