Assertion: anthracite | /r/ObjectUse | used for space heating
Facets:
Source sentences:
text: In addition, anthracite is used for space heating as it is one of the cleanest types of coal to burn—producing less smoke than other types.
text: Anthracite has the highest energy content of all coals and is used for space heating and generating electricity.
text: Anthracite has the highest energy content of all coals and is used for space heating and generating electricity.