About: http://webisa.webdatacommons.org/309814806

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	This does of course depend on climate and terrain; in e.g. desert and permafrost regions, they may indeed last for centuries,
http://www.w3.org/ns/prov#wasQuotedFrom	freeforums.org