query: SELECT DISTINCT ?item (COUNT(DISTINCT ?statement) AS ?count)
  WHERE { 
      ?statement prov:wasDerivedFrom/pr:P248 ?item .
      VALUES ?topics { wd:Q202864 wd:Q10538943 } .
      ?item wdt:P50 ?author ;
            wdt:P932 [] ;
            wdt:P921 ?topics.
      ?author wdt:P21 wd:Q6581072 ;
              wdt:P496 ?orcid .
      [] wdt:P2860 ?item .
      
  }
  GROUP BY ?item
  #HAVING (?count > 10)
  ORDER BY DESC(?count)