About: http://webisa.webdatacommons.org/402794380

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 tunnel should be at least 50 meters long or head out to something that would provide cover as you exit such as over a hill or on the other side of a creek.
http://www.w3.org/ns/prov#wasQuotedFrom	graywolfsurvival.com