About: http://webisa.webdatacommons.org/316679973

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	By E^2=(p*c)^2 (m*c^2)^2, which for a massless particle reduces to E=p*c, for any velocity other than the speed of light, the energy and momentum of said particle is 0.
http://www.w3.org/ns/prov#wasQuotedFrom	phys.org