query: SELECT ?covidence (COUNT(DISTINCT ?qid) as ?count) (GROUP_CONCAT(?qid;separator=",") as ?qids)
  {
  	?item wdt:P8150 ?value .
      FILTER( strstarts(?value, "covidwho-") )
      BIND(xsd:integer(STRAFTER(?value, "-")) as ?covidence)
      BIND(STRAFTER(str(?item), "y/") as ?qid)
  }
  GROUP BY ?covidence
  ORDER by ?covidence