About: http://webisa.webdatacommons.org/81726483

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	An expression is a mathematical phrase that combines operations, numbers, and, in some cases, variables.
http://www.w3.org/ns/prov#wasQuotedFrom	mathgoodies.com