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: Illyria:  I traveled all of them as I pleased . I walked worlds of smoke and half - truths , intangible . Worlds of torment and of unnamable beauty . Opaline towers as high as small moons . Glaciers that rippled with insensate lust . And one world with nothing but shrimp . I tired of that _ one _ quickly .

worlds