About: http://webisa.webdatacommons.org/300123849

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	Also, at the end of each document is a link to an online supplier of this math tool that I used to purchase my own class set of rekenreks.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com