Complex sentence: He served as the editor and later part owner of the "Providence Journal" and later was the 21st Governor of Rhode Island between 1849 and 1851, as a member of the Whig Party.
Split into simpler sentences: He served as editor and was later part owner of the "Providence Journal". He was the 21st Governor of Rhode Island, serving between 1849 and 1851 as a member of the Whig Party.