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: Joe:  Hey , we 'll use it to scale our fish .
Gus: Yeah , that 's a good idea . We can use it to scale our fish .
Film Brain: Seriously ? You find a bloody knife that clearly belongs to the guy who stole your car that might have been used in a serious crime , and all they can think about is using it to gut fish ? Yeah , I know that 's the joke , but it 's a bad _ one _ .

joke