PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Child labor was a problem mainly in the informal economy, especially in agricultural, construction, sales, and small food-product manufacturing.
http://www.w3.org/ns/prov#wasQuotedFrom
  • refworld.org