TASK 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.
PROBLEM: Bobby Newman:  Okay , top five inventions of mankind : Um , the wheel , submarines , penicillin ...
Stephanie Layne: Slippers , creme brulee , spoons ...
Bobby Newman: Wait . But now we have six top - five inventions .
Stephanie Layne: Then let 's do ten ... and add _ four _ more .
Bobby Newman: Yes . I wanted to add dry - erase markers anyway .

SOLUTION: inventions

PROBLEM: Richard Castle:  Now might be the time for wild military industrial complex theories . And here 's _ one _ . Tanner was about to post super - secret military documents . They took him out with a drone and now they 're covering it up . Which , actually , is n't so wild .

SOLUTION: theories

PROBLEM: 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 _ .

SOLUTION:
shark