Complex sentence: The New Jersey Department of Military and Veterans Affairs is a governmental department of the State of New Jersey, and is administered by the Adjutant General and staff which oversees the activities of the New Jersey Army National Guard and New Jersey Air National Guard.
Split into simpler sentences: The New Jersey Department of Military and Veterans Affairs is a governmental department of the State of New Jersey. It is composed of the New Jersey Army National Guard as well as the New Jersey Air National Guard.