Complex sentence: This now unoccupied area was colonized by the English in 1686 as part of Deerfield, I n 1753, Greenfield was set off from Deerfield and incorporated as a separate town, named for the Green River.
Split into simpler sentences: This now unoccupied area was colonized by the English in 1686 as part of Deerfield. In 1753, Greenfield was set off from Deerfield and incorporated as a separate town, named for the Green River.