About: http://webisa.webdatacommons.org/308635772

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 addition, the first relief valve limits the vacuum in the line to a predetermined level thereby preventing damage to tissues, especially heart tissues, if the line between the heart and the vent valve assembly becomes occluded.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com