Assertion: brewery | /r/HasProperty | difficult
Facets:
value: to keep infection-free
type: PURPOSE
value: to keep clean
type: PURPOSE
Source sentences:
text: A very few breweries still use wooden vats for fermentation but wood is difficult to keep clean and infection-free and must be repitched often, perhaps yearly.
text: A very few breweries still use wooden vats for fermentation but wood is difficult to keep clean and infection-free and must be repitched often, perhaps yearly.