About: http://webisa.webdatacommons.org/267686005

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	Rigid tubes with air-tight valve mechanisms (???trocars???) are then inserted into the gas-filled abdominal cavity so that a video camera and other surgical instruments can be introduced into the abdomen.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk