Complex sentence: The preparations for the centennial celebration of the Statue of Liberty began in 1979 whrst formed by the National Park Service (NPS), the custodians of the statue since 1933, to investigate possible development alternatives.
Split into simpler sentences: The preparations for the centennial celebration of the Statue of Liberty began in 1979. Formed by the National Park Service (NPS), the custodians of the statue since 1933, to investigate possible development alternatives.