Complex sentence: The only real violence came as a result of school integration, with violent riots and fights occurring in Clark High School when black gangs and youths began attacking the whites and sparking white flight from the school district from 1965 to 1971.
Split into simpler sentences: The only real violence came as a result of school integration, with violent riots and fights occurring in Clark High School when black gangs and youths began attacking the whites. Integration sparked white flight from the school district from 1965 to 1971.