Assertion: anthracite | /r/HasProperty | clean
Facets:
Source sentences:
text: Anthracite is also clean in the sense of "less smoke", a fact that was exploited by blockade runners in the American Civil War wishing to avoid detection and later on several railroads advertised the fact that they used Anthracite, as it meant less soot and smoke for the passengers (ever seen an image of people on a steam train?
text: Anthracite coal is clean burning and costs less per million BTUs than any other energy source out there!