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: Wizard of Oz:  As for you , my galvanized friend , you want a heart . You do n't know how lucky you are not to have one . Hearts will never be practical until they can be made unbreakable .
Tin Woodsman: But I still want _ one _ .

heart