Complex sentence: Charles Secretan (1815--1895) was a Swiss philosopher born on January 19,1815 in Lausanne, Switzerland, where he also died on January 21,1895.
Split into simpler sentences: Charles Secretan (1815--1895) was a Swiss philosopher. He was born on January 19,1815 in Lausanne, Switzerland, where he also died on January 21,1895.