query: SELECT ?item
    (COUNT(DISTINCT ?p) as ?count)
    (SAMPLE(?p) as ?sample_p)
  {
      ?item wdt:P407 wd:Q7737 ;
            wdt:P31/wdt:P279? wd:Q202444 . 
      FILTER NOT EXISTS { ?item rdfs:label ?l. FILTER (lang(?l) = "ru") }
      OPTIONAL { ?p wdt:P735 ?item }
  }
  GROUP BY ?item
  ORDER BY DESC(?count) ?item