query: SELECT DISTINCT ?item ?itemLabel ?search
  WHERE{
    ?item wikibase:sitelinks 0 .
    ?item wdt:P31 wd:Q101352 .
  
    ?item wikibase:statements ?statementCount.
    FILTER(?statementCount = 1).
  
    FILTER(!bound(?backlink))
    OPTIONAL{ ?backlink ?p1 ?item .  }
    
    FILTER(!bound(?ref))
    OPTIONAL{
      ?item ?p2 [prov:wasDerivedFrom ?ref] .
      ?ref ?pr [] .
    }
  
    OPTIONAL{
      ?item ?claim ?dummy0 .
      ?property wikibase:propertyType wikibase:ExternalId .
      ?property wikibase:directClaim ?claim
    }
    FILTER(!bound(?dummy0))
      ?item rdfs:label ?name_label . FILTER(LANG(?name_label) = "en") .
      BIND (URI(CONCAT("https://www.wikidata.org/w/index.php?title=Special%3ASearch&search=", STR(?name_label))) AS ?search) .
    SERVICE wikibase:label { bd:serviceParam wikibase:language "en" . }
  }