About: http://webisa.webdatacommons.org/82019747

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	If you write x = 4 + 3i, than x is a symbol for the complex number (4, 3). x is no longer just a number, as it would be with an equation.
http://www.w3.org/ns/prov#wasQuotedFrom	parallax.com