Complex sentence: Nineteen fifty-five found her concentrating on air defense exercises and acting as planeguard for carriers, and in 1956, cruising in the Mediterranean, she joined in NATO exercies, returning home in June.
Split into simpler sentences: Nineteen fifty-five found her concentrating on air defense exercises and acting as planeguard for carriers. In 1956, she joined in NATO exercises in the Mediterranean, returning home in June.