About: http://webisa.webdatacommons.org/357558959

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	oduction of coal, iron, copper, and other minerals has always presented a need for blasting and associated blast holes.
http://www.w3.org/ns/prov#wasQuotedFrom	qbookshop.com