About: http://webisa.webdatacommons.org/212353981

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	A bastion is a structure projecting outward from the main enclosure of a fortification, situated in both corners of a straight wall (termed curtain), facilitating active defence against assaulting troops.
http://www.w3.org/ns/prov#wasQuotedFrom	panoramio.com