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: Suen:  Tina 's safe .
Cleopatra: What 's that ?
Suen: There 's a location device in her underwear . We can detect her from as far away as 500 meters .
Cleopatra: When did you plant it ?
Suen: You wear _ one _ , too . So do I. It 's made from special fabric and a thin semiconductor which works by body temperature and friction .
Cleopatra: Wow ! Cutting - edge technology .
Nacky: You mean , I got one too ?
Suen: Not yet , but I can rig one up for you if you like .
Nacky: No thanks . I like my freedom .

device