: Musicianhttp://learningsparql.com/ns/addressbook# Create a prefix for http://learningsparql.com/ns/addressbook# Hit Enter to save Double click to create a prefix | rdfs:subClassOf | : Personhttp://learningsparql.com/ns/addressbook# Create a prefix for http://learningsparql.com/ns/addressbook# Hit Enter to save Double click to create a prefix |