About: http://webisa.webdatacommons.org/427731521

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	Light at sunrise and sunset is position and altitude dependent, allowing for phenomena such as Alpenglow or brightly illuminated high-altitude clouds while the ground is dark
http://www.w3.org/ns/prov#wasQuotedFrom	flightgear.org