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.

Example Input: Optimus Primal: Every one of these alien structures has been designed for a specific purpose , Rattrap . This _ one _ is busy , and I 'm betting I can fly close enough to take it out .
Rattrap: With what ? One of your famous " We can do it " speeches ?
Optimus Primal: A transwarp explosion .
Blackarachnia: Hahaha ! You 'll blow yourself to atoms !
Optimus Primal: If it saves this planet , it 'll be worth it . If not , I 'm no worse off .
Example Output: structures

Example Input: Diane Chambers: Well , it 's refreshing to know you draw the line somewhere .
Sam Malone: Hey , hey , I draw lot 's of lines . As a matter of fact , there are three categories of women I never get involved with : married , underage and comatose .
Norm Peterson: He 's added _ one _ .
Example Output: line

Example Input: Dr. Mark Greene: We 're going to have to do a lumbar puncture . You ever done one ?
John Carter: Uh no , but I 've seen it done .
Dr. Mark Greene: See one , do one , teach _ one _ .
Example Output:
puncture