About: http://webisa.webdatacommons.org/181494259

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	representations of them, and finally, actual examples of the writing boards themselves
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com