About: http://webisa.webdatacommons.org/304990073

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	Throughout the world, cities such as Paris, New York, Rome and Shanghai all harbor long-submerged networks that once served crucial functions, from eerie catacombs to clandestine hideouts and ancient aqueducts to underground societies
http://www.w3.org/ns/prov#wasQuotedFrom	americancivilwar.com