About: http://webisa.webdatacommons.org/449876946

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	Areas that contain fluid, such as blood vessels or the stomach, as well as the amniotic fluid, do not respond to the sound waves and therefore appear as black areas on the scan.
http://www.w3.org/ns/prov#wasQuotedFrom	familyeducation.com