About: http://webisa.webdatacommons.org/453067709

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	The "speed of light for example is not a constant and the speed and direction of light varies in different regions of the cosmos and is effected by dust, gas, and gravity.
http://www.w3.org/ns/prov#wasQuotedFrom	cosmology.net