Assertion: cigarette butt's filter | /r/HasProperty | made as a cavity filter
Facets:
value: from cellulose acetate fibre
type: OTHER
value: from activated charcoal
type: OTHER
value: from paper
type: OTHER
value: embedded into the cellulose acetate
type: LOCATION
Source sentences:
text: The filter may be made from cellulose acetate fibre, paper or activated charcoal (either as a cavity filter or embedded into the cellulose acetate).