query: SELECT ?item (GROUP_CONCAT(?wp) as ?wp)
  {
  	?item wdt:P31 wd:Q39715 . 
  	OPTIONAL { ?item wdt:P625 ?coor }
      FILTER(!BOUND(?coor))
      OPTIONAL { [] schema:about ?item ; schema:isPartOf / wikibase:wikiGroup "wikipedia" ; schema:name ?atitle ; schema:inLanguage ?inlang BIND(CONCAT("[[:",?inlang,":",str(?atitle), "|",?inlang,"]]") as ?wp) }
  }
  GROUP BY ?item