About: http://webisa.webdatacommons.org/110441932

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	Where F is the trade flow, M is the economic mass of each country, D is the distance and G is a constant.
http://www.w3.org/ns/prov#wasQuotedFrom	wikipedia.org