Complex sentence: When Dunn purchased of Agen's property for $7,000 in 1914, he had been living in the affluent neighborhood of First Hill, Seattle, and looking to build a summer house, and today's Dunn Gardens are on what remains of that estate.
Split into simpler sentences: When Dunn purchased of Agen's property for $7,000 in 1914, he had been living in the affluent neighborhood of First Hill, Seattle, and looking to build a summer house. Today's Dunn Gardens are on what remains of that estate.