About: http://webisa.webdatacommons.org/217989691

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	4) - Impassable terrain, or some terrains can only be passed by certain types of units.
http://www.w3.org/ns/prov#wasQuotedFrom	civfanatics.com