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: Tony Croy:  You know , you do n't make very many mistakes baby , but you certainly made _ one _ when you forgot to divorce me before you married this Wall Street sucker . Now then , are you going to give me the stuff or do I have to be nasty and carry tales .

mistakes