anchor.diff:              let product =
                   {
                       UID = row.Product_uid
  -                    Title = row.Product_title
  +                    Title = row.Product_title |> normalize
                       Description = description
                       Attributes = attributes
                   }
  
positive.code:             let product =
                  {
                      UID = row.Product_uid
                      Title = row.Product_title
                      Description = description
                      Attributes = attributes
                  }
  
negative.code:         evaluation
          |> List.iter (fun (block,quality) ->
              printfn "  %i: %.3f" block (quality.RMSE))
  
          let overall = evaluation |> Seq.averageBy (fun (_,x) -> x.RMSE)
  
          printfn "Overall: %.3f" overall
          { RMSE = overall }
  
  