About: http://webisa.webdatacommons.org/354104775

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, U.S. Pat. No. 3,377,333, U.S. Pat. No. 3,377,334 and U.S. Pat. No. 3,423,389, among others, disclose the use of such materials as catalysts and bleaching agents in rosin acid esterification.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es