query: #title: Operate an embassy, check value
  # Complex constraint from [[Property talk:P137]]
  #
  SELECT ?item {
  	?item wdt:P137 ?value;
            wdt:P31 wd:Q3917681.
      MINUS {
        VALUES ?list { wd:Q6256 wd:Q7275 wd:Q103817 }
        ?value wdt:P31/wdt:P279* ?list
      }
  }