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: Woman in Door-Way:  Used to be a nice little family living at Number 29 . They missed one mortgage payment , just _ one _ , they got booted out . For you lot !
Donna Noble: Do n't get all chippy with me , Vera Duckworth . Pop your clogs on and go feed whippets !

payment