About: http://webisa.webdatacommons.org/231529376

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	Its not, the proton is a seething mass of virtual quarks and gluons, but you can still define an average radius (like defining an average sea level even though the surface consists of waves).
http://www.w3.org/ns/prov#wasQuotedFrom	phys.org