query: SELECT ?item 
  	(group_concat(concat("\u007B\u007BP\u007C",strafter(str(?property),"/entity/"),"\u007D\u007D");separator=", ") as ?p) 
  {
  	?item wdt:P3176 ?property .
  	FILTER NOT EXISTS { ?item wdt:P31 wd:Q11266439 }
  }
  GROUP BY ?item
  ORDER BY ?item