About: http://webisa.webdatacommons.org/334279179

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	We do not know, but physicists believe that because gravity is a force that shares many technical similarities to the other three natural forces, it must also have a quantum particle that mediates it, and this is called the graviton.
http://www.w3.org/ns/prov#wasQuotedFrom	stanford.edu