Complex sentence: Mrs. Henderson became convinced that the street would be the perfect location for a permanent vice-presidential dwelling, suitable for entertaining, and she offered to give the government a house overlooking Meridian Hill Park, whose land she had also contributed to the city.
Split into simpler sentences: Mrs. Henderson became convinced that the street would be the perfect location for a permanent vice-presidential house, suitable for entertaining. She offered to give the government a house overlooking Meridian Hill Park, whose land she had also contributed to the city.