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: Shirley Holmes:  I need to know about implants .
Bartholomew 'Bart' James: Oh , they 're tracking devices . They usually look like tiny ball bearings , often found up the abductee 's nose ; sometimes in the neck .
Shirley Holmes: When an abductee has _ one _ , does that mean that the aliens are going to come back for him ?
Bartholomew 'Bart' James: Possibly . There 've been reports of double , even triple , abductees . Some people have all the luck .

nose