About: http://webisa.webdatacommons.org/402688586

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	It also has hints about how to tell if the positioning is correct for the xrays, which may help your friend evaluate whether positioning was a factor or not.
http://www.w3.org/ns/prov#wasQuotedFrom	retrievertraining.net