query: SELECT DISTINCT ?item ?itemLabel ?contactgegevens WHERE {
    ?item wdt:P31 wd:Q5.
    FILTER NOT EXISTS {?item wdt:P570 [].}#niet overleden
    ?item wdt:P6379 wd:Q1886369.
    ?item wdt:P7763 wd:Q73555012.
    OPTIONAL {
       ?item wdt:P6275 ?auteursrechtvertegenwoordiger.
      BIND (
       IF(?auteursrechtvertegenwoordiger = wd:Q71528227, wd:Q2377084, 1/0)
       AS ?pictoright)
    }
    OPTIONAL {?item wdt:P2013 ?facebook.}
    OPTIONAL {?item wdt:P6634 ?linkedin.}
    OPTIONAL {?item wdt:P2002 ?twitter.}
    OPTIONAL {?item wdt:P2003 ?instagram.}
    OPTIONAL {?item wdt:P856 ?website.}
    OPTIONAL {?item wdt:P1875 ?vertegenwoordiger.}
    OPTIONAL {?item wdt:P3220 ?kvk.}
    BIND (
    COALESCE(
      ?pictoright, ?website, ?vertegenwoordiger, ?instagram, ?facebook, ?linkedin, ?twitter, ?kvk
    ) AS ?contactgegevens
    )
  }