About: http://webisa.webdatacommons.org/251596761

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	The highest levels are usually found in underground spaces such as basements, caves and mines.
http://www.w3.org/ns/prov#wasQuotedFrom	hse.gov.uk