About: http://webisa.webdatacommons.org/360470343

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	A cave-in is when walls, floors, and other terrain plummet downwards to lower Z-levels under the influence of gravity.
http://www.w3.org/ns/prov#wasQuotedFrom	dwarffortresswiki.org