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.

Ray Burrows:  Do you know your ass from your elbow , detective ?
Detective Ed Green: I know an ass when I see _ one _ .
ass

Aaron Hotchner:  There have been two known copycats .
Penelope Garcia: Correct . The first _ one _ was Heriberto Seda . He killed three and wounded four in New York City . And then , there was a 14-year - old in Japan named Seito Sakakibara . He killed two other children and left the sign of the Zodiac behind .
David Rossi: The fact is the Zodiac was driven by a need for notoriety and control .
Aaron Hotchner: He enjoyed the terror he spread through the city .
copycats

Mickey Meyer:  That 's it ! I 'm never doing it , nobody 's touching mine !
Barbara: Do n't you want to have a baby ?
Mickey Meyer: I 'll buy _ one _ .

baby