Complex sentence: O'Keefe was married to famed rock/blues singer Bonnie Raitt from April 27,1991 to November 9,1999, divorced Raitt and is now a practicing Zen Buddhist.
Split into simpler sentences: O'Keefe was married to famed rock/blues singer Bonnie Raitt from April 27,1991 to November 9,1999. He divorced Raitt and is now a practicing Zen Buddhist.