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: Harmon, John:  First , a warrior must know how to fight for , protect those who can not defend themselves . Army taught me this well . Learn how to fight , shoot , how to survive . But anybody can fight . It 's the second part that 's the hardest .
Luther SickBoy Maryboy: What 's that ?
Harmon, John: I say the mark of a true warrior is _ one _ who knows when to retreat .

warrior