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: Mike Wheeler:  Dustin what are you doing ? Dustin ? Dustin !
Lucas Sinclair: Dustin !
Dustin Henderson: I need to see your compasses .
Mike Wheeler: What ?
Dustin Henderson: Your compasses , all of your compasses . Right now !
Mike Wheeler: What 's exciting about this ?
Dustin Henderson: Well they 're all facing North , right ?
Lucas Sinclair: Yeah , so ?
Dustin Henderson: Well that 's not true North .
Mike Wheeler: What do you mean ?
Dustin Henderson: I mean exactly what I just said . That 's not true North . Are you both seriously this dense ? The sun rises in the East and sets in the West , right ? Which means * that 's * true North
Mike Wheeler: So what you 're saying is the compasses are broken ?
Dustin Henderson: Do you even understand how a compass works ? Do you see a battery pack on this ?
Mike Wheeler: No .
Dustin Henderson: No you do n't because it does n't need _ one _ . The needle 's naturally drawn to the Earth 's magnetic North Pole .
Lucas Sinclair: So what 's wrong with it ?
Dustin Henderson: Well that 's what I could n't figure out but then I remembered : you can change the direction of a compass with a magnet . If there 's a presence of a more powerful magnetic field , the needle deflects to that power . And then I remembered what Mr Clarke said : the gate would have so much power ...
Mike Wheeler: -disrupt the electromagnetic field .
Dustin Henderson: Exactly .
Lucas Sinclair: Meaning if we follow the compasses North ... ?
Dustin Henderson: They should lead us to the gate .

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