PREFIX foaf: PREFIX ex: SELECT ?x ?hpage ?name ?mbox ?age ?blurb ?friend FROM WHERE ( ?x foaf:name ?name ) ( ?x foaf:mbox ?mbox ) ( ?x foaf:homepage ?hpage ) ( ?x foaf:knows ?friend ) [ ( ?x ex:ageInYears ?age ) ] [ ( ?x ex:blurb ?blurb ) ]