About: http://webisa.webdatacommons.org/21328590

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 such buttons are actuated as described above, the circle fills when the button is actuated and remains filled until the button is again actuated.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com