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: Javier Esposito:  Two blocks away from the alley , blood smeared on the armrest . This is definitely it .
Richard Castle: He was shot somewhere else and then he came here ? Why not go home ? Why not go get patched up ?
Kate Beckett: He was meeting someone in that alleyway .
Javier Esposito: Phone . His last call was 4:47 a.m. , just before he died .
Kate Beckett: Run that number .
Javier Esposito: Right .
Kevin Ryan: Hey , Beckett . Gun . It 's a _ 0.38 _ . Recently fired .
Richard Castle: So it was a shootout . That 's how he got the shoulder wound .
Kate Beckett: Which means wherever he came from , there might be another body .
Javier Esposito: I know where he was coming from .
Richard Castle: Where ?
Javier Esposito: His last entry was 299 1st Avenue .
Richard Castle: What ... what 's at 299 1st Ave . ?
Kate Beckett: Captain Montgomery 's house .

Gun