About: http://webisa.webdatacommons.org/43234264

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	It takes long working hours.For underground mining more advanced equipments are required.There are extra costs incurred for activities such as pumping, electricity, digging etc.
http://www.w3.org/ns/prov#wasQuotedFrom	jewelinfo4u.com