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: Guru Pathik:  The greatest illusion of this world is the illusion of separation . Things you think are separate and different are actually _ one _ and the same .
Aang: Like the four nations .
Guru Pathik: Yes . We are all one people , but we live as if divided .

Things