PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Whereas American teachers all used overhead projectors, allowing them to focus students' attention on the teacher's rules and equations, rather than their own, in Japan, the preferred device was a blackboard, allowing students to track the evolution of everyone's ideas.Japanese schools are far from perfect.
http://www.w3.org/ns/prov#wasQuotedFrom
  • mathforum.org