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: Sir Edward Marion:  Actually , it 's a theory of mine , _ one _ that I 've held for many years . Reduced to its simplest commn demoninator , all it means is that the man with the superior equipment ultimately must win , regardleess of speed or firepower .
William Barclay 'Bat' Masterson: Oh , that may be true of target practice or big game hunting , but you forget one thing , Sir Edward . Out here , when a man draws a gun , his target can think and shoot back .

theory