About: http://webisa.webdatacommons.org/345714541

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	Synthetic polymer materials, for example, such as polyvinyl alcohol, polyvinyl chloride, polymethyl vinylketone and the like, as well as naturally occurring materials such as coal tar, and pitch may also be used.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es