About: http://webisa.webdatacommons.org/438284667

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	In the system, a dispatcher gives a train or a maintenance crew verbal authority (a warrant) to occupy a portion of main line track between named locations (e.g., mile markers, switches, stations, or other points).
http://www.w3.org/ns/prov#wasQuotedFrom	google.es