Complex sentence: He serenades eagles with Prokofiev on his Stradivarius cello; he is an avid fisherman; and he has a first-rate art collection, which his grandfather collected for his grandmother.
Split into simpler sentences: He serenades eagles with Prokofiev on his Stradivarius cello, and is an avid fisherman. Hawke has a first-rate art collection, which his grandfather collected for his grandmother.