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: Lady Elizabeth:  It seems to me that a war is never over until a man makes peace with those who tried to harm him . If not , _ one _ is a casualty forever . The heart can not bear the burden of hate .

man