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: John Diggle:  I thought you did n't want anything to do with the Bratva .
Oliver Queen: I do n't , but if it 's a choice between me crossing a line and the two of you crossing _ one _ , that is a very easy choice .
John Diggle: What did you do ?

line