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: Charles Townsend:  Now I 'm going to have to hurry along , Angels . Work , work work .
Sabrina Duncan: Another case , Charlie ? Gee , I thought you just finished one .
Charles Townsend: I did , and the last _ one _ really took a lot out of me .
Charles Townsend: But something else just came up , and you know how I put my heart into my work . Bye , Angels !
Sabrina Duncan, Jill Munroe, Kelly Garrett: Goodbye Charlie !

case