About: http://webisa.webdatacommons.org/443922409

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	When the region is a surface, its boundary is a closed curve, and you get one of several line integral/surface integral formulas.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com