query: SELECT ?qid ("P31" AS ?pid) ("Q6881511" AS ?value) ("/* add statement based on existing statements */" AS ?comment) WHERE {
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
    ?item wdt:P31 wd:Q4830453.
    ?item wdt:P1454 ?Rechtsform.
    {?Rechtsform wdt:P31 wd:Q1269299.}
    UNION
    {?Rechtsform wdt:P279 wd:Q1269299.}
    MINUS { ?item wdt:P31/wdt:P279* wd:Q6881511. }
    BIND(SUBSTR(STR(?item), (STRLEN(STR(<http://www.wikidata.org/entity/>))) + 1) AS ?qid)
  }
  LIMIT 1000