Complex sentence: The TWA Corporate Headquarters' Building was the corporate headquarters of Trans World Airlines until 1964, when the airline moved its headquarters to New York City; the building is located at 1735 Baltimore Avenue in downtown Kansas City, Missouri.
Split into simpler sentences: The TWA Corporate Headquarters' Building was the corporate headquarters of Trans World Airlines until 1964, when the airline moved its headquarters to New York City. The building is located at 1735 Baltimore Avenue in downtown Kansas City, Missouri.