Assertion: anthracite | /r/HasProperty | viable option
Facets:
Source sentences:
text: While coal might not be as common as it once was, anthracite is still a viable option for heating homes and small businesses, and bituminous coal is still used for blacksmithing projects.
text: Anthracite differs from wood in that it needs a draft from the bottom, and Judge Fell proved with his grate design that it was a viable heating fuel.[citation needed]