Complex sentence: Annis Stockton became known as the "Duchess of Morven," their mansion and estate in Princeton, New Jersey, where they entertained many prominent guests, including George Washington, with whom she had a correspondence, sending him numerous poems as part of it.
Split into simpler sentences: Annis Stockton became known as the "Duchess of Morven," their mansion and estate in Princeton, New Jersey, where they entertained many prominent guests. These included George Washington, with Annis Stockton had a correspondence, sending him numerous poems as part of it.