Given the task definition, example input & output, solve the new input case.
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.
Example: Jess Mastriani: No, I don't want another crooler, thank you very much.
FBI Agent Nicole Scott: But it's good for you. It's got... honeyglaze. Please die for this crooler, Jess.
Jess Mastriani: I've had _ two _ already. Who eats three croolers in a night?
FBI Agent Nicole Scott: Take a look. [Nicole takes a huge bite] Mmmmm, Mmmmm, Mmmmm!
Output: crooler
In this example, the number two refers to something that the word: crooler.

New input case for you: Slade Wilson: Where am I ?
Oliver Queen: As far away from the world I could get you . Where you ca n't hurt anyone ever again .
Slade Wilson: That 's your weakness , kid . You do n't have the guts to kill me .
Oliver Queen: No . I have the strength to let you live .
Slade Wilson: Oh , you 're a killer . I know , I created you . You 've killed plenty .
Oliver Queen: Yes , I have . You helped turned me into a killer when I needed to be _ one _ . And I 'm alive today because of you . I made it home because of you . And I got to see my family again . But over the past year , I needed to be more ... but I faltered . But then I stopped you . Without killing . You helped me become a hero , Slade . Thank you .
Slade Wilson: You think I wo n't get out of here ? You think I wo n't kill who you care for ?
Oliver Queen: No , I do n't . Because you 're in purgatory .
Slade Wilson: I keep my promises , kid . I keep my promises ! I keep my promises .
Output:
killer