Complex sentence: Violence escalates into riots and Lex Luthor, the mayor of Metropolis, establishes a totalitarian state in which mysterious platoons of flying masked robots endowed with flight and superhuman resilience known as the Liberators are the law.
Split into simpler sentences: Violence escalates into riots and Lex Luthor, the mayor of Metropolis, establishes a totalitarian state. Mysterious platoons of masked robots endowed with flight and incredible strength known as the Liberators become the law.