Complex sentence: In July 1985, at age 21, Sells was working at a carnival in Forsyth, Missouri, where he met Ena Cordt (aged 28), who had brought her 4-year-old son to the carnival.
Split into simpler sentences: In July 1985, when he was 21 years old, Sells was working at a carnival in Forsyth, Missouri. He met Ena Cordt, 28, who had brought her 4-year-old son to the carnival.