About: http://webisa.webdatacommons.org/81067717

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	However, human soft tissue is not homogenous; it is composed of regions of acoustically differing tissues, such as fat, muscle and blood, in which the local propagation velocity varies.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr