Complex sentence: Simon Cameron lived to the age of 90, and upon his death in 1889, the house passed to his daughter, Margaretta, the widow of Richard Haldeman, a local newspaper publisher and Congressman.
Split into simpler sentences: Simon Cameron lived to the age of 90, and upon his death in 1889, the house passed to his daughter, Margaretta. She was the widow of Richard Haldeman, a local newspaper publisher and Congressman.