About: http://webisa.webdatacommons.org/63119980

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	?? Water-filled quarries and pits hide rock ledges, old machinery and other hazards.
http://www.w3.org/ns/prov#wasQuotedFrom	msha.gov