About: http://webisa.webdatacommons.org/138732588

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	The liquid or gas, which can be air, in the balloon acts as an optically clear path to the tissue, while the balloon pushes blood and other interfering material out of the field of view.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es