<http://webisa.webdatacommons.org/prov/413543706>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/199950196> .
<http://webisa.webdatacommons.org/199950196>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/199950196>	<http://www.w3.org/ns/prov#value>	"Polystyrene is a thermoplastic resin made by the free radical polymerization of styrene or vinyl benzene." .
<http://webisa.webdatacommons.org/199950196>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<globalspec.com> .