About: http://webisa.webdatacommons.org/373521494

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	Temporary roof supports such as safety posts, jacks, or other devices are to be used when roof material is being taken down and permanent roof supports are being installed.
http://www.w3.org/ns/prov#wasQuotedFrom	msha.gov