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: Emily Prentiss:  Look , Reid , I know you 're mad at us because we did n't tell you what really happened , and I understand that . But I promise you , we had no choice . You mourned the loss of a friend . I mourned the loss of _ six _ .
Emily Prentiss: This
Emily Prentiss: whole thing gave me an ulcer . Please do n't give me another one .

friend