About: http://webisa.webdatacommons.org/56655975

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	From what I remember from coding the caves (it was a while ago ), the ratio of air/stone approaches 50% as you go down.
http://www.w3.org/ns/prov#wasQuotedFrom	facepunch.com