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: Jim Brass:  So the guy in took an arrow through the throat and it prolonged his life ?
Dr. Al Robbins: Apparently .
Catherine Willows: And what are the odds of it not hitting any major artery ?
Dr. Al Robbins: Whatever comes right before _ zero _ .

odds