(
   ( rel 
      ( tuple 
         (
            ( SName  string )
            ( Bev  int )
            ( PLZ  int )
            ( Vorwahl  string )
            ( Kennzeichen  string ))))
   (
      ( "Berlin"  1859000  1000  "030"  "B" )
      ( "Hamburg"  1580000  2000  "040"  "HH" )
      ( "Muenchen"  1267000  8000  "089"  "M" )))