Complex sentence: Peter Frederick Rothermel (July 8,1817-August 15,1895) an American painter born in Nescopeck, Pennsylvania 18 July, 1817, although some date his birth earlier in 1813 or 1814.
Split into simpler sentences: Peter Frederick Rothermel (July 8,1817--August 15,1895) was an American painter. Rothermel was born in Nescopeck, Pennsylvania in 1817, although some date his birth earlier in 1813 or 1814.