query: SELECT ?item ?sl ?st
  {
      ?item wdt:P31 wd:Q11424 .
      ?article schema:about ?item ; schema:isPartOf <https://ca.wikipedia.org/> .
      FILTER NOT EXISTS { ?item wdt:P57 ?dir }
      OPTIONAL { ?item wikibase:sitelinks ?sl; wikibase:statements ?st }
  }
  ORDER BY DESC(xsd:integer(STRAFTER(str(?item), "Q")))