About: http://webisa.webdatacommons.org/172506554

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	Structures that are dense (such as bone) will appear white, air will be black, and other structures will be shades of gray.Veins are not normally seen in an x-ray, so a special dye (called contrast) is used to highlight them.
http://www.w3.org/ns/prov#wasQuotedFrom	emanuelmed.org