Complex sentence: His body was found the next day by a roommate in his Van Nuys apartment, longtime friend Lisa Lenes said, Martin had health problems in recent years, and she believed he died of natural causes.
Split into simpler sentences: His body was found the next day by a roommate in his Van Nuys apartment, longtime friend Lisa Lenes said. She said Martin had health problems in recent years, and she believed he died of natural causes.