query: SELECT ?item ?enwiki ?sts
  WHERE
  {
      ?item wdt:P31 wd:Q6456916 ; wikibase:statements ?sts .
      OPTIONAL { ?article1 schema:about ?item ; schema:isPartOf <https://en.wikipedia.org/>  ; schema:name ?title         BIND( CONCAT("[[:en:",?title,"|",?title,"]]") as ?enwiki)  }
  }