About: http://webisa.webdatacommons.org/110135621

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	This Program Policy Letter (PPL) is intended for Mine Safety and Health Administration (MSHA) personnel, mine operators, contractors, miners' representatives, and other interested parties.
http://www.w3.org/ns/prov#wasQuotedFrom	msha.gov