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: Lionel:  You and I have lurched happily through eighteen months of marriage .
Jean: No , _ nineteen _ .
Lionel: Nineteen months , without either of us having reached for the carving knife .
Jean: I threw some carrots at you once .
Lionel: That 's not really in the same category , is it ?

months