Carbonic maceration
Carbonic maceration is a winemaking technique , often associated with the French wine region of Beaujolais , in which whole grapes are fermented in a carbon dioxide rich environment prior to crushing . 
<triplet> Carbonic maceration <subj> winemaking <obj> subclass of <subj> carbon dioxide <obj> uses <triplet> winemaking <subj> grapes <obj> made from material