Complex sentence: The NYCTA, a public authority presided by New York City, was created in 1953 to take over subway, bus, and streetcar operations from the city, and placed under control of the state-level MTA in 1968.
Split into simpler sentences: The NYCTA, a public authority presided by New York City, was created in 1953 to take over subway, bus, and streetcar operations from the city. The NVCTA was under control of the state-level MTA in 1968.