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<http://webisa.webdatacommons.org/123969475>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/123969475>	<http://www.w3.org/ns/prov#value>	"Barrier 146 preferably has a smooth rounded external surface to minimize possible abrasion to a vessel or other tissue and a central opening 148 to allow liquid flow therethrough." .
<http://webisa.webdatacommons.org/prov/393608261>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/123969475> .