Complex sentence: Oscar Rivadeneira (born in 1960 in Lima, Peru) is a retired Peruvian boxer, who fought with Michael Spinks in 1983 for the Light Heavyweight championship.
Split into simpler sentences: Oscar Rivadeneira (born in 1960 in Lima, Peru) is a retired Peruvian boxer. Rivadeneira fought with Michael Spinks in 1983 for the Light Heavyweight championship.