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: Mac Taylor:  Libby had three of these necklaces in her jewelry box . She was wearing a fourth , probably placed there by her killer , and now _ five _ .
Jo Danville: Mac , what are we missing ? Is this some kind of dead pool game ?
Danny Messer: It 's actually worse than that . We got subpoenas for Libby 's blog and Facebook , so I went through the tiers of her friends to see if I could track the original source of the invitation to last night 's party . I found one of her private groups . She sent this out to them .
Jo Danville: What
Jo Danville: the hell is this ?
Danny Messer: This is a game . You single out a virgin in the school and seduce her into believing that she 's popular . The girls give her a kind of makeover , they take her to a party , they give her a few drinks , and , uh ... a guy , a guy takes her virginity .
Jo Danville: Okay , this is the most disgusting thing I 've heard in a long time .
Danny Messer: Yeah . According to the postings , the guys who take the girl 's virginity are in Libby 's private group , and one of the more active ones is Jake Bennett .
Mac Taylor: Libby 's boyfriend ?
Jo Danville: Erin Watson . That 's the same girl in the photo from the party . I ca n't believe what I 'm looking at , this is so cruel .
Mac Taylor: These symbols , what do they represent ?
Danny Messer: A score . After the guys , you know , uh ... the girls get graded . Look here . She had " some interesting moves for a novice . " That earned her four cherries for performance .
Mac Taylor: One of the most private , intimate moments of a girl 's life . Jake not only steals it from her , he debases the experience .
Danny Messer: Not Jake . It 's Libby . Jake and the guys give her the information , then she does her thing- gives a girl marks for her , uh , body , the way she smells , the things that she said during the act , and then , uh , she ... sends it out to her group of friends .
Jo Danville: Okay , so the necklaces in her jewelry box - those were tokens given to the girls , kind of like a scarlet letter ?
Mac Taylor: And whoever has one of those necklaces has a good motive for revenge .

necklaces