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: Penelope Garcia:  This is the block Derek was taken from . That blue dot is him and then at 9:23 , we loose him . So . , I checked all the other cell signals in the area , they 're all legit , aside from _ one _ , that I was able to find thanks to some technology no one else outside this room needs to know about

signals