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:  Why are men so desperate to hang onto their youth . It 's a futile quest .
Eleanor Grey: Futility lies in questing after a woman 's heart they can never own .
Lady Elizabeth: Or the heart of _ one _ who no longer exists .

woman