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: David 'Dave' Seville:  The Wall was built after a war that divided the country in _ two _ ; once a year this side of the wall has a concert for their friends and family on the other side , where many freedoms we take for granted are denied .

side