Complex sentence: Oil tycoon J. Paul Getty originally opened a gallery adjacent to his home in Pacific Palisades, finding that he quickly ran out of room, he decided to open a second museum on the property (his original home still sits at the back of the property).
Split into simpler sentences: Oil tycoon J. Paul Getty originally opened a gallery adjacent to his home in Pacific Palisades. Finding that he quickly ran out of room, he decided to open a second museum on the property (his original home still sits at the back of the property).