Question: What Melbourne, Australia street gang founded by members of Victoria's South Sudanese community fought a rival gang made up of youths from a South Pacific background in March 2016 after the Moomba parade.   
Sentence (from "South Sudan at the 2016 Summer Olympics"): South Sudan had been an independent nation since 2011, but its civil war had delayed its membership with the International Olympic Committee until 2015, making 2016 its first official appearance at the Olympic Games.
Relevant evidence: No