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.

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 .
structures

Lt. Reed:  All we have left is to reset the emitters .
Lieutenant Talas: What 's the frequency ?
Lt. Reed: I 'll do it .
Lieutenant Talas: You do n't trust me .
Lt. Reed: No offence , but when it comes to our weapons frequencies , I would n't trust my own mother .
Lieutenant Talas: Is your mother considered a security risk ?
Lt. Reed: It 's just an expression .
Lieutenant Talas: An odd _ one _ . My mother 's security clearance is higher than mine .
expression

Jo Grant:  What on earth is he doing inside a horsebox ?
Doctor Who: It is n't exactly a horsebox . It just happens to look like _ one _ .
Jo Grant: You mean there is n't a horse inside ?
Doctor Who: No more than there 's a policeman inside my police box .

horsebox