Complex sentence: The League of Legends World Championship is an annual international electronic sports "League of Legends" championship tournament hosted by Riot Games, where teams compete for the champion title, the pound Summoner's Cup, and the US $1,000,000 champion prize.
Split into simpler sentences: The League of Legends World Championship is the annual international electronic sports "League of Legends" championship tournament hosted by Riot Games. Teams compete for the champion title, the Summoner's Cup, and the US $1,000,000 champion prize.