query: #Country (P17) 
  # Every Dutch public library branch (plb) must have a P17/Q55 statement, as all Dutch libraries are located in the country (P17) of The Netherlands (Q55).
  # Does not (yet) include the Carribean parts of the Kingdom of the Netherlands
  # Count the number of public library branches that are in Nederland (Q55)
  
  SELECT DISTINCT 
  ?country ?countryLabel
  (COUNT(?plb) as ?NumberOfPublicLibraryBranches)
  
  WHERE
    {
    ?plb p:P31/ps:P31 wd:Q28564,wd:Q11396180.  #all PLBs world wide
    ?plb wdt:P17 ?country.
  
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". 
                           }  
  }
  GROUP BY ?country ?countryLabel  
  ORDER BY DESC ( ?NumberOfPublicLibraryBranches)