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: Commander Sisko:  We need to find out who created this virus .
Commander Sisko: You 're our best hope .
Major Kira: Eighteen years is a long time .
Odo: Besides , even if she finds who did this , that 's no guarantee they can help us .
Commander Sisko: We just have to hope they remember the antidote .
Odo: That 's assuming they ever bothered to create _ one _ .

antidote