About: http://webisa.webdatacommons.org/216005033

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	While exact calculations from developing countries are sparse, the Unites States Fish & Wildlife Service, for example, has calculated that bird and other wildlife watching is worth US$32 billion per year in the United States alone.
http://www.w3.org/ns/prov#wasQuotedFrom	columbia.edu