Complex sentence: On June 27,1654,50,000 acres (200 km²) of land reaching from what is currently the Bronx, west along Long Island Sound, to the Hutchinson River, was signed under the Treaty Oak near Bartow Pell Mansion in Pelham.
Split into simpler sentences: On June 27,1654,50,000 acres (200 km²) of land reaching from what is currently the Bronx, west along Long Island Sound, to the Hutchinson River. It was signed under the Treaty Oak near Bartow Pell Mansion in Pelham.