About: http://webisa.webdatacommons.org/8677173

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	[1] A mechanical train stop mechanism is a device that is affixed to the track structure near the running rail.
http://www.w3.org/ns/prov#wasQuotedFrom	dot.gov