About: http://webisa.webdatacommons.org/220181942

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	Greenbrier, a tank car manufacturer, commented that, ???the most vital of these modifications is addition of a trapezoidal or conforming half-height head shield to prevent penetration of tank cars by loose rails.
http://www.w3.org/ns/prov#wasQuotedFrom	federalregister.gov