Complex sentence: While at Los Angeles City College, Roddenberry began dating Eileen-Anita Rexroat, who was two years younger, despite the displeasure of her parents, who saw him as the common son of a policeman.
Split into simpler sentences: While at Los Angeles City College, Roddenberry began dating Eileen-Anita Rexroat, who was two years younger. Her parents disproved of Roddenberry and saw him as the common son of a policeman.