Complex sentence: The mansion is built of wood in a loose Palladian style, and was constructed by George Washington in stages between 1758 and 1778; it occupies the site of an earlier, smaller house built by George Washington's father Augustine, some time between 1726 and 1735.
Split into simpler sentences: The mansion is built of wood in a loose Palladian style, and was constructed by George Washington in stages between 1758 and 1778. It occupies the site of an earlier, smaller house built by George Washington's father Augustine, some time between 1726 and 1735.