About: http://webisa.webdatacommons.org/256058542

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	Proximity detection is a technology that uses electronic sensors to detect motion or the location of one object relative to another object.
http://www.w3.org/ns/prov#wasQuotedFrom	msha.gov