Complex sentence: The interior of "A" Deck contains the main lobby and purser's office, the infirmary, barber, beautician and steward's facilities, as well as the health physics laboratory intended to monitor the effects of the nuclear reactor.
Split into simpler sentences: The interior of A "Deck contains the main lobby and purser's office; and the infirmary, barber, beautician, and stewards" facilities. It also houses the health physics laboratory, intended to monitor the effects of the nuclear reactor.