Given the task definition and input, reply with output. 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.

John Greer: You must be wondering who I am .
John Reese: I think you work for Decima . I think you 're the man to blame for all this .
John Greer: And what gives you that impression , Mr. Reese ? Oh , yes , I know all about you , John . And you , Ms. Shaw . Since your untimely departure from Northern Lights , I understand that you 're in need of a cause .
Sameen Shaw: The only thing I need is an excuse to put this bullet in between your eyes .
John Reese: I got _ one _ . Your company strapped a bomb to my chest and used me to plant a virus , a virus you 're going to tell me how to stop .
John Greer: I do n't think so . I 'm rather invested in the outcome of that virus . Besides , my company adapted its code , but it did n't originate with Decima . We found it on a laptop , the very same laptop that you and Kara Stanton were sent to retrieve from Ordos , China . But if you shoot me , Mr. Reese , then you 'll never learn the name of the man responsible for its creation .
excuse