Complex sentence: Marymount Manhattan College was founded in 1936 by the Religious of the Sacred Heart of Mary as a two-year women's college and a New York City extension of Marymount College, Tarrytown in Tarrytown, New York.
Split into simpler sentences: Marymount Manhattan College was founded in 1936 as a two-year women's college by the Religious of the Sacred Heart of Mary. It was also an extension of Marymount College, Tarrytown in Tarrytown, New York.