About: http://webisa.webdatacommons.org/10031969

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	For each sentence decide whether it takes a singular or a plural possessive and then add the proper form in the blank:
http://www.w3.org/ns/prov#wasQuotedFrom	ck12.org