Assertion: anthracite | /r/CapableOf | produce almost no smoke
Facets:
Source sentences:
text: It produces almost no smoke or emissions, and won’t leave a build-up in your chimney.
text: At that time, residences were typically heated with anthracite or "hard" coal, which produces higher heat value and less smoke than "soft" or bituminous coal.
text: Anthracite coal has no soot residue and produces no smoke when consumed.
text: It produces almost no smoke or emissions, and won’t leave a build-up in your chimney.