About: http://webisa.webdatacommons.org/24812327

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	For example, if ball is a moving sphere, this will add a point to its trail: trail = curve()
http://www.w3.org/ns/prov#wasQuotedFrom	vpython.org