Complex sentence: Stéphane Derenoncourt is a French "vigneron" working as a consultant for numerous estates in Bordeaux and other wine producers worldwide, with his wife Christine Derenoncourt runs Vignerons Consultants and owns Domaine de l'A in the Côtes de Castillon and Derenoncourt California in Napa Valley.
Split into simpler sentences: Stéphane Derenoncourt is a French "vigneron" working as a consultant for numerous estates in Bordeaux and other wine producers worldwide. With his wife, Christine Derenoncourt, he runs Vignerons Consultants and owns Domaine de l'A in the Côtes de Castillon and Derenoncourt, California in Napa Valley.