About: http://webisa.webdatacommons.org/113223880

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	When a user requests the contrast-specific image signal or the combined image signal, the switch further allows the user to toggle between all three image signal types after all signals are received.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com