About: http://webisa.webdatacommons.org/260603388

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	It was James Clerk Maxwell who showed in the 1800s that light is an electromagnetic wave that travels through space at the speed of light.
http://www.w3.org/ns/prov#wasQuotedFrom	grandinetti.org