Complex sentence: DeWolf was a member of the Rhode Island House of Representatives from 1797 to 1801,1803 to 1812,1817-1821, and 1829-1837, serving as speaker of the House from 1819 to 1821.
Split into simpler sentences: DeWolf was a member of the Rhode Island House of Representatives from 1797 to 1801, again from 1803 to 1812,1817 to 1821, and 1829to 1837. He served as speaker of the House from 1819 to 1821.