About: http://webisa.webdatacommons.org/317221886

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	In this way he proved what physicists would later call the principle of equivalence: all objects fall at the same rate, regardless of their mass or composition, provided there are no forces acting on them other than gravity.
http://www.w3.org/ns/prov#wasQuotedFrom	newscientist.com