About: http://webisa.webdatacommons.org/101693487

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	Courtesy Jim Loy???s Trachtenberg System of Math page (though buying the book is the best option).
http://www.w3.org/ns/prov#wasQuotedFrom	ireaderreview.com