Picassos not by PIcasso

PREFIX dc: <http://purl.org/dc/elements/1.1/>
SELECT ?creator ?title ?objectInfo
WHERE {
     ?objectInfo dc:title ?title .
     ?title bif:CONTAINS 'Picasso' .
FILTER (
     !EXISTS {
       ?objectInfo dc:creator ?creator .
       ?creator bif:CONTAINS 'Picasso' .
     }
   )
?objectInfo dc:creator ?creator .
}