About: http://webisa.webdatacommons.org/45291231

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	Sometimes called external programs, doors are the most common way to add games, utilities, and other extensions to BBSes.
http://www.w3.org/ns/prov#wasQuotedFrom	boingboing.net