<http://webisa.webdatacommons.org/prov/153682240>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/102021039> .
<http://webisa.webdatacommons.org/102021039>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.es> .
<http://webisa.webdatacommons.org/102021039>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/102021039>	<http://www.w3.org/ns/prov#value>	"In some prior art valves, when the syringe or medical implement pushes the plug or piston, the plug or piston is pierced by a piercing device, such as a spike." .