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: Missy:  And I 'm going to need eight snipers .
Kate Lethbridge-Stewart: _ Eight _ what ?
Missy: Three for each heart and two for my brain stem . You 'll have to switch me off fast before I can regenerate .

snipers