Complex sentence: After 27 years of marriage, Barbara Patterson Blackman and Charles Blackman divorced in 1978, largely because of his alcoholism, and he married the young artist Genevieve de Couvreur, a 19 year old friend of his children.
Split into simpler sentences: After 27 years of marriage, Barbara Patterson Blackman and Charles Blackman divorced in 1978, largely because of his alcoholism. He married the young artist Genevieve de Couvreur, a 19 year old friend of his children.