About: http://webisa.webdatacommons.org/377238716

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	ALWAYS place blocks on firm, level, ground free of protrusions and other discontinuities.
http://www.w3.org/ns/prov#wasQuotedFrom	msha.gov