Assertion: grape's stem | /r/HasAspect | high tannin content
Facets:
value: relatively
type: DEGREE
Source sentences:
text: For red winemaking, stems of the grapes are usually removed before fermentation since the stems have a relatively high tannin content; in addition to tannin they can also give the wine a vegetal aroma (due to extraction of 3-isobutyl-2-methoxypyrazine which has an aroma reminiscent of green bell peppers.)