About: http://webisa.webdatacommons.org/227587589

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	Other tools and software, such as spreadsheets or the Geometer's Sketchpad, may be substituted if they are available.
http://www.w3.org/ns/prov#wasQuotedFrom	mathforum.org