Complex sentence: The 2017 Rivals Rifts (or RR) was a series of cross-regional League of Legends tournaments organized by Riot Games held for one week starting July 3,2017 in Berlin, Kaohsiung, Santiago, Moscow and Ho Chi Minh City.
Split into simpler sentences: The 2017 Rivals Rifts (or RR) was a series of cross-regional League of Legends tournaments organized by Riot Games for one week starting July 3,2017. It was held in Berlin, Kaohsiung, Santiago, Moscow and Ho Chi Minh City.