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: Warhawk:  Lantern , Barda , you 've been around the galaxy once or twice . Ever see anything like this ?
Big Barda: Never .
Green Lantern: Whatever it is , it appears to have somehow embedded itself in his skin
Batman: Any chance of getting it off ?
Green Lantern: I must remind you , this is not just one alien species before us , it 's _ two _ , and I do not yet understand the subtleties of their interaction .
Warhawk: I 'll take that as an " I do n't know . "

species