About: http://webisa.webdatacommons.org/2816095

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	SF usually only had one set of helpers and only if the train was a heavy one.
http://www.w3.org/ns/prov#wasQuotedFrom	railworksamerica.com