About: http://webisa.webdatacommons.org/8514174

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 mechanical waves, harmless at low intensities, penetrate the body???s tissues and bones, and an echo effect is used to generate images of anatomical structures such as fetuses in the womb, organs, and blood vessels.
http://www.w3.org/ns/prov#wasQuotedFrom	kurzweilai.net