PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Learning rigorous, standards-based subject matter can be challenging for many students, but it is particularly difficult for those students who are not yet proficient English speakers.
http://www.w3.org/ns/prov#wasQuotedFrom
  • cal.org