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: Cmdr. Drury:  Smart , you appear to be in pretty good shape , do you work out ?
Maxwell Smart: I jog one hundred miles every day ! Would you believe it ? One hundred miles !
Cmdr. Drury: I find that hard to believe .
Maxwell Smart: Would you believe _ fifty _ ?
Cmdr. Drury: No !
Maxwell Smart: How about two push ups and a deep breath ?

miles