About: http://webisa.webdatacommons.org/147373221

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	The shallow urban underground is an intricate network of tunnels, conduits, utilities, and other buried structures comparable to a natural karstic system, except that urban karst is generated much faster.
http://www.w3.org/ns/prov#wasQuotedFrom	utexas.edu