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: Derek Savage - Host:  I got my first gun when I was about 10-years - old , and I 've had _ one _ ever since . Plus , I used to work in the machine gun business , so I guess you could say I have a little bit of knowledge on this- on this topic- on this subject right here .

gun