About: http://webisa.webdatacommons.org/438425904

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 mathematics, a complex number is a number which can be formally defined as an ordered pair of real numbers (a,b), often written:
http://www.w3.org/ns/prov#wasQuotedFrom	schools-wikipedia.org