| http://www.w3.org/ns/prov#value | - Most of the Champagne produced is non-vintage ??? typically abbreviated NV on labels ??? meaning that it is a blended product of grapes from multiple vintages (usually 15-25% from older vintages, designed to add complexity); there is a predominant base vintage, however, that some producers are choosing to reveal to consumers (along with disgorgement dates) in order to increase transparency.
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