Complex sentence: Hancock's daughter, Gina Rinehart, was bitterly opposed to Hancock's relationship with Porteous, and the conflicts between Rinehart and Porteous overshadowed his final years and continued until more than a decade after his death.
Split into simpler sentences: Hancock's daughter, Gina Rinehart was bitterly opposed to Hancock's relationship with Porteous. The conflicts between Rinehart and Porteous overshadowed his final years and continued until more than a decade after his death.