<http://webisa.webdatacommons.org/prov/292780717>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/334585211> .
<http://webisa.webdatacommons.org/334585211>	<http://www.w3.org/ns/prov#value>	"Each retainer is generally tubular or cylindrical and is formed of a plastic material, such as polyvinyl chloride or nylon." .
<http://webisa.webdatacommons.org/334585211>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/334585211>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<freepatentsonline.com> .
<http://webisa.webdatacommons.org/prov/59832146>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/334585211> .