Complex sentence: Tontcho Tontchev (born December 1,1972 in Sliven) is an Bulgarian boxer, who won the Lightweight Silver medal at the 1996 Summer Olympics.
Split into simpler sentences: Tontcho Tontchev (born December 1,1972 in Sliven, Bulgaria) is an Bulgarian boxer. Tontchev won the Lightweight Silver medal at the 1996 Summer Olympics.