Conversation so far:
What did J. Paul Getty do in his later years?
J. Paul Getty remained an inveterate hard worker, boasting at age 74 that he often worked 16 to 18 hours per day overseeing his operations across the world.
What type of operations did J. Paul Getty run?
J. Paul Getty was a British petrol-industrialist who founded Getty Oil.

Question: What else did he do during those years?
Self-contained rewrite: What else did J. Paul Getty do during the later years besides remaining an inveterate hard worker?