About: http://webisa.webdatacommons.org/201497744

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	Essentially, the door is a portal that stores 3d space, and that mass replaces (not adds as above, sorry, words) the mass of the object, but only from within it.
http://www.w3.org/ns/prov#wasQuotedFrom	giantitp.com