Complex sentence: It was flown by Zira, Cornelius, and Dr. Milo from the year A.D.3955 back to A.D.1971, its command module splashed down in the Pacific Ocean off the California coast, and was recovered by the U.S. Navy.
Split into simpler sentences: It was flown by Zira, Cornelius, and Dr. Milo from the year 3955 back in time to the 1970s. Its command module splashed down in the Pacific Ocean off the coast of California, and was recovered by the U.S. Navy.