About: http://webisa.webdatacommons.org/440900304

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 fitting at the direct centre of the image, mostly obscured in this view, is a spring-loaded 30-psi safety blowout valve.
http://www.w3.org/ns/prov#wasQuotedFrom	shroomery.org