Complex sentence: Warren Angus Ferris (December 25,1810 in Glen Falls, New York-February 8,1873) was a trapper and fur trader in the Rocky Mountains during the early 1830's.
Split into simpler sentences: Warren Angus Ferris (December 25,1810-February 8,1873) was born in Glen Falls, New York. Ferris was a trapper and fur trader in the Rocky Mountains during the early 1830's.