About: http://webisa.webdatacommons.org/271894842

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	They can do this individually or in small groups, but the problem should be a little disguised or more complicated such as proving the following result:
http://www.w3.org/ns/prov#wasQuotedFrom	ck12.org