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: Conner Rhodes:  Are you a retard too ?
Lucy: No !
Conner Rhodes: How do you know ?
Lucy: Because he told me .
Conner Rhodes: But he 's a retard !
Lucy: It takes one to know _ one _ .

retard