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.

Mrs. Raines: Mr. Drood !
Drood: I know , that 's a new lock .
Mrs. Raines: This is a new lock here .
Drood: Is it ? Listen , Mrs. Raines ...
Mrs. Raines: I do n't have a key for that .
Drood: I made you a key .
Mrs. Raines: If there should be a fire , or something ...
Drood: Look , I made you this key !
Mrs. Raines: Do you have _ one _ for me ?
Drood: Oh , God ...
key