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: Degra:  It may seem odd to celebrate the completion of a weapon , particularly _ one _ designed to destroy an entire planet . But recall the words of Enarchis , written some fifty years into the Great Diaspora : " Without a world of our own , we are but children , lost in the wilderness . " One day we 'll emerge from this wilderness , and our work here will ensure ... that we 'll never be lost again . To a new era for all Xindi .

weapon