About: http://webisa.webdatacommons.org/17975775

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, there were a number of reports in the early '80s which indicated excessive eye-strain to the operator who needed to look continously at the brighter b-o-w monitor screen in a dimmly lit examination room ^^.
http://www.w3.org/ns/prov#wasQuotedFrom	ob-ultrasound.net