Complex sentence: Gillardeau oysters are produced by the Gillardeau family and their small private company, which was founded in 1898 in Bourcefranc-le-Chapus near La Rochelle and the Île d'Oléron in western France.
Split into simpler sentences: Gillardeau oysters are produced by the Gillardeau family and their small private company. It was founded in 1898 in Bourcefranc-le-Chapus near La Rochelle and the Île d'Oléron in western France.