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: G'Kar:  Why does any advanced civilization seek to destroy a less advanced _ one _ ? Because the land is strategically valuable , because there are resources that can be cultivated and exploited , but most of all - simply because they can . You have experienced much the same on your own world . There are humans for whom the words " never again " carry special meaning . As they do for us .

civilization