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: Phil Diffy:  She 's making me do all the girl stuff that she used to do with Tia , like go shopping ! I now own at least three halter tops .
Barbara Diffy: Phil , you do n't have to buy them .
Phil Diffy: Well , when she buys _ one _ I get one half off , I 'd be crazy not to .

tops