Complex sentence: Robert Field Stockton (20 August 1795--7 October 1866) was a United States naval officer, notable in the capture of California during the Mexican-American War, who was from a notable political family also served as a U.S. Senator from New Jersey.
Split into simpler sentences: Robert Field Stockton (20 August 1795--7 October 1866) was a United States naval officer, notable in the capture of California during the Mexican-American War. Stockton was from a notable political family and also served as a U.S. Senator from New Jersey.