About: http://webisa.webdatacommons.org/273165859

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The particles may contain fillers such as tire cord material, carbon black and the like and are desirably reasonably free of grease, dirt or other contaminents, although considerable contamination is readily tolerated in the invention.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com