query: #Values used by property P3438
  SELECT ?value ?valueLabel ?ct ?sampleitem ?sampleitemLabel
  WHERE
  {
    {
      SELECT ?value (count(*) as ?ct) (SAMPLE(?item) as ?sampleitem)
      WHERE
      {
        ?item wdt:P3438 ?value
      }
      GROUP BY ?value
      ORDER BY DESC(?ct)
      LIMIT 1000
    }
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en" }
  }
  ORDER BY DESC(?ct) ASC(?value)