query: SELECT DISTINCT ?item (COUNT(?geboortedatum) AS ?datumCount)
    WITH {
     SELECT DISTINCT ?item WHERE {
    ?item wdt:P31 wd:Q5.
    ?item wdt:P9152 [].
    } 
    } AS %results
      WHERE {
       INCLUDE %results.
     ?item wdt:P569 ?geboortedatum.
    SERVICE wikibase:label { bd:serviceParam wikibase:language "nl, en". }
  }
  GROUP BY ?item
  HAVING (?datumCount > 1)