Complex sentence: He and co-founder of the rock band The Cars, Benjamin Orr, were known to be close friends, enforced in a song Ocasek wrote as a dedication to Orr upon his death in 2000.
Split into simpler sentences: He and co-founder of the rock band The Cars, Benjamin Orr, were known to be close friends. Their friendship was commemorated in a song Ocasek wrote as a dedication to Orr upon his death in 2000.