PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Many people mistakenly assume that the growth of deserts is a natural phenomena; but according to UNCCD, desertification involves ???a gradual process of soil productivity loss and the thinning out of the vegetative cover because of human activities and climatic variations such as prolonged droughts and floods,??? in arid and semi-arid regions.
http://www.w3.org/ns/prov#wasQuotedFrom
  • columbia.edu