About: http://webisa.webdatacommons.org/315073057

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In yet another embodiment, the valve or seal 14 is a duckbill or one-way valve permitting fluid, air and contaminants to flow from the chest but not permitting introduction of air into the chest.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca