About: http://webisa.webdatacommons.org/189371839

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	FIG. 20 is a graph, somewhat schematic, showing the change in expected sonic wave reflectance at a tissue-cavity boundary.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com