About: http://webisa.webdatacommons.org/117438696

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	They were intended to particalize light energy but Einstein admitted in the ???50s that it was still not known if light is a wave or a particle.
http://www.w3.org/ns/prov#wasQuotedFrom	drroyspencer.com