About: http://webisa.webdatacommons.org/137217352

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	In each level there is a boss, and destroying said boss grants the player a key which can be used to exit the stage.
http://www.w3.org/ns/prov#wasQuotedFrom	segaretro.org