About: http://webisa.webdatacommons.org/240386216

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	?? May set warning signals, such as flares, flags, lanterns, or torpedoes at front of and at rear of train during emergency stops to warn oncoming trains;
http://www.w3.org/ns/prov#wasQuotedFrom	indeed.com