Assertion: carbon black's carbon | /r/HasProperty | produced
Facets:
value: from coal
type: OTHER
value: from various carbonaceous raw materials
type: OTHER
Source sentences:
text: Granular activated carbon can be produced from various carbonaceous raw materials, each of which will impart typical qualities to the finished pro-duct.
text: Most filter carbon is manufactured from coal, but other substances like wood and nut shells are also used.
text: Filter carbon is a manufactured product.