Complex sentence: Pérez is the cousin of Los Angeles mayor Antonio Villaraigosa and has spent seven years handling political matters for the United Food and Commercial Workers, a union representing supermarket workers, and also has served as political director of the California Labor Federation.
Split into simpler sentences: Pérez is the cousin of Los Angeles mayor Antonio Villaraigosa and has spent seven years handling political matters for the United Food and Commercial Workers, a union representing supermarket workers. He has also served as political director of the California Labor Federation.