Complex sentence: Wojciech Bartnik (born December 2,1967 in Olesnica) was a boxer from Poland, who won a Light Heavyweight Bronze medal at the 1992 Summer Olympics.
Split into simpler sentences: Wojciech Bartnik (born December 2,1967 in Olesnica, Poland) was a Polish boxer. Bartnik won a Light Heavyweight Bronze medal at the 1992 Summer Olympics.