Complex sentence: Olivier Basselin (c.1400--c.1450), French poet, was born in the Val-de-Vire in Normandy about the end of the 14th century.
Split into simpler sentences: Olivier Basselin (c.1400--c.1450) was French poet. He was born in the Val-de-Vire in Normandy about the end of the 14th century.