About: http://webisa.webdatacommons.org/417792242

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	Frequently, although not exclusively, the signal is visually determinable, such as the formation of a color or a color change.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com