Assertion: wooden barrel | /r/MadeOf | white oak
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Source sentences:
text: Modern wooden barrels for wine-making are made of French common oak (Quercus robur), white oak (Quercus petraea), or American white oak (Quercus alba) and typically have standard sizes: "Bordeaux type" 225 litres (59 US gal; 49 imp gal), "Burgundy type" 228 litres (60 US gal; 50 imp gal) and "Cognac type" 300 litres (79 US gal; 66 imp gal).