About: http://webisa.webdatacommons.org/307998972

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	There are also places where one main may cross another, such as a place where the main carrying air into the mine passes over a belt carrying coal out.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com