Complex sentence: The United States Post Office building in Larchmont, New York was constructed in 1937 as part of a program started in 1853 by the Office of the Supervising Architect of the United States Treasury Department.
Split into simpler sentences: The United States Post Office building in Larchmont, New York is a post office building built in 1937. It was part of a program started in 1853 by the Office of the Supervising Architect of the United States Treasury Department.