About: http://webisa.webdatacommons.org/191679974

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	Great Britain Patent No. 1,211,689 and German Patent No. 1,694,476 disclose that substances such as calcium fluoride, molybdenum disulfide, lead tungstate, antimony trioxide, graphite, talcum and asbestos are effective nucleating agents.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es