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: Young Richie:  So you Haystack , what are you building ? A dam or something ?
Young Ben: Yeah .
Young Richie: Have you ever built _ one _ before ?
Young Richie: No
Young Richie: How do you know it will work ?
Young Ben: Well of course it would why would n't it ?
Young Richie: Yeah but how do you know ?
Young Ben: I just know .
Young Bill: Yeah , he just knows .
Young Bev: Yeah .
Young Eddie: Yeah .
Young Stan: Yeah .
Young Richie: Well , okay .

dam