<http://webisa.webdatacommons.org/448093428>	<http://www.w3.org/ns/prov#value>	"In a preferred embodiment, the stem tube 20 is made from FEP. Alternatively, the stem tube 20 may be fabricated from other materials such as TFE or Polyethylene." .
<http://webisa.webdatacommons.org/448093428>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/prov/426357826>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/448093428> .
<http://webisa.webdatacommons.org/448093428>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .