About: http://webisa.webdatacommons.org/2255172

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	For example, standard bentonite-sodium hydroxide-lignite-chrome lignosulfonate muds are contaminated by common minerals encountered during drilling, i.e. salt, gypsum, anhydrite or calcium carbonate,
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com