query: SELECT ?coauthor ?coauthorLabel ?count WHERE {
      {
      SELECT ?coauthor (COUNT(?item) AS ?count)
      WHERE
      {
        ?item wdt:P31 wd:Q13442814.
        ?item wdt:P50 wd:Q56878423.
        ?item wdt:P50 ?coauthor.
        FILTER (?coauthor != wd:Q56878423)
      }
      GROUP BY ?coauthor
      ORDER BY ASC(?count)
      LIMIT 100
    }
    SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }
  }
  LIMIT 100