query: SELECT ?item (COUNT(?sitelink) AS $slcnt) WHERE {
    ?item wdt:P641 wd:Q7291 .
    ?item wdt:P5008 wd:Q66098665 .
    ?item wdt:P585 ?time 
    FILTER (?time <= "2021-01-01T00:00:00Z"^^xsd:dateTime) .
    FILTER EXISTS { ?item wdt:P585 ?dummy0 }
    FILTER NOT EXISTS { ?item wdt:P2094 wd:Q63874701 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q63874701 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q18608583 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q44726365 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q45319806 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q53572691 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q53572582 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q53572574 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q655951 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q149882 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q20807089 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q773829 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q13506679 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q57947373 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q2593517 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q40504484 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q20807089 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q20807092 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q73989685 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q66207654 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q797176 }
    FILTER NOT EXISTS { ?item wdt:P361 wd:Q2593520 }
    FILTER NOT EXISTS { ?item wdt:P361 wd:Q2423124 }
    FILTER NOT EXISTS { ?item wdt:P17 ?dummy0 }
    FILTER NOT EXISTS { ?item wdt:P3085 ?dummy0 }
    OPTIONAL { ?sitelink schema:about ?item . }
  } 
  GROUP BY(?item) ORDER BY DESC(?slcnt) LIMIT 8000