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: Donald Groves:  This is my tooth . It was in my head . This tooth and I have been together since we were kids . This tooth chewed on my mom .
Scott Ross: You should sell it .
Donald Groves: Sell it ?
Scott Ross: Sell it . The tooth from the mouth of Donald Groves ? Do you know how much that 's worth on the open market ?
Donald Groves: How much ?
Scott Ross: Plenty .
Donald Groves: Who 'd wanna buy my tooth ?
Scott Ross: Collectors .
Donald Groves: Collectors ?
Scott Ross: Collectors . People collect everything . Stamps , salt and pepper shakers , World 's Fair tchochkes . Some people collect crime stuff . Lindbergh ladder , Ted Bundy 's toenail clippings , and this .
Donald Groves: We 'd have to get a fence , right ?
Scott Ross: We 're in prison . How hard 's that gon na be ?
Donald Groves: Ross , if we get a good price , I still got _ 30 _ more .

fence