query: SELECT ?person ?personLabel ?nationality ?nationalityLabel ?occupation ?occupationLabel
  WHERE{
    ?person wdt:P3716 wd:Q12773225 .
    ?person wdt:P106 wd:Q483501 .
    OPTIONAL {?person wdt:P27 ?nationality .} . 
  SERVICE wikibase:label { bd:serviceParam wikibase:language "en" . } 
    
   }