About: http://webisa.webdatacommons.org/435918743

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	They were also widely employed on temporary railroads used by general contractors engaged in dam, road, tunnel and other major construction projects.
http://www.w3.org/ns/prov#wasQuotedFrom	si.edu