prefix bsbm: <http://www4.wiwiss.fu-berlin.de/bizer/bsbm/v01/vocabulary/>
  prefix bsbm-inst: <http://www4.wiwiss.fu-berlin.de/bizer/bsbm/v01/instances/>
  prefix rev: <http://purl.org/stuff/rev#>
  prefix xsd: <http://www.w3.org/2001/XMLSchema#>

  Select ?country ?product ?nrOfReviews ?avgPrice
  {
    { Select ?country (max(?nrOfReviews) As ?maxReviews)
      {
        { Select ?country ?product (count(?review) As ?nrOfReviews)
          {
            ?product a %ProductType% .
            ?review bsbm:reviewFor ?product ;
                    rev:reviewer ?reviewer .
            ?reviewer bsbm:country ?country .
          }
          Group By ?country ?product
        }
      }
      Group By ?country
    }
    { Select ?country ?product (avg(xsd:float(xsd:string(?price))) As ?avgPrice)
      {
        ?product a %ProductType% .
        ?offer bsbm:product ?product .
        ?offer bsbm:price ?price .
      }
      Group By ?country ?product
    }
    { Select ?country ?product (count(?review) As ?nrOfReviews)
      {
        ?product a %ProductType% .
        ?review bsbm:reviewFor ?product .
        ?review rev:reviewer ?reviewer .
        ?reviewer bsbm:country ?country .
      }
      Group By ?country ?product
    }
    FILTER(?nrOfReviews=?maxReviews)
  }
  Order By desc(?nrOfReviews) ?country ?product