About: http://webisa.webdatacommons.org/199831342

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	For example, while machicolation was an extremely effective method of wall and tower defense, but sometimes resource availability, time, or knowledge might have prevented its construction.
http://www.w3.org/ns/prov#wasQuotedFrom	mit.edu