About: http://webisa.webdatacommons.org/20085196

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 the following examples assume that a is a constant and x and y are variables.
http://www.w3.org/ns/prov#wasQuotedFrom	mathonweb.com