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: Batman:  I 'll find Mockridge if I have to tear this place apart , Nygma .
The Riddler: I doubt it , I made sure the perils are quite lethal . You have eight minutes , gentlemen , then Mockridge becomes the only good corporate shark : a dead _ one _ .

shark