Complex sentence: Frost wrote the poem in June, 1922 at his house in Shaftsbury, Vermont.HE had been up the entire night writing the long poem "New Hampshire" and had finally finished when he realized morning had come.
Split into simpler sentences: Frost wrote the poem in June, 1922 at his house in Shaftsbury, Vermont. He had been up the entire night writing the long poem "New Hampshire" and had finally finished when he realized morning had come.