Complex sentence: The Association of Producers of the "Vins de Pays Côtes de Gascogne" was founded on 15 March 1979, it protects the interests of the members, determines the production standards and is controlling the respect of these rules.
Split into simpler sentences: The Association of Producers of the "Vins de Pays Côtes de Gascogne" was founded on 15 March 1979. It protects the interests of the members, determines the production standards and ensures respect of these rules.