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: Dustin Henderson:  There 's something wrong with your sister .
Mike Wheeler: What are you talking about ?
Dustin Henderson: She 's got a stick up her butt .
Lucas Sinclair: Yeah , it 's because she 's been dating that douchebag Steve Harrington .
Dustin Henderson: Yeah she 's turning into a real jerk .
Mike Wheeler: She 's always been a real jerk !
Dustin Henderson: Nuh - uh , she used to be cool . Like that time she dressed up as an elf for our Elder Tree campaign .
Mike Wheeler: Four years ago !
Dustin Henderson: Just saying .
Lucas Sinclair: Later .
Will Byers: It was a seven .
Mike Wheeler: Huh ?
Will Byers: The roll - it was a _ seven _ . The Demogorgon ... it got me . See you tomorrow .

roll