Complex sentence: Wilhelm Siegmund Frei (September 5,1885-January 27,1943) was a German dermatologist best known for his contributions to Durand-Nicholas-Favre disease, a sexually transmitted disease found mainly in tropical and subtropical climates.
Split into simpler sentences: Wilhelm Siegmund Frei (September 5,1885-January 27,1943) was a German dermatologist. Frei was best known for his contributions to Durand-Nicholas-Favre disease, a sexually transmitted disease found mainly in tropical and subtropical climates.