Complex sentence: The Longfellow National Historic Site, also known as the Vassall-Craigie-Longfellow House, is a historic site located at 105 Brattle Street in Cambridge, Massachusetts that was for almost fifty years the home of noted American poet Henry Wadsworth Longfellow.
Split into simpler sentences: The Longfellow National Historic Site, also known as the Vassall-Craigie-Longfellow House, is a historic site located at 105 Brattle Street in Cambridge, Massachusetts. For almost fifty years, it was the home of noted American poet Henry Wadsworth Longfellow.