/-------------------------------------------------------------------- Pgl005304/4-45  (1)
      |                                                                               
      |-------------------------------------------------------------------- Pgl011606/4-44  (6)
      |                                                                               
      |                                                     /-------------- Pgl017830/53-94 (2)
      |                                        /-----71-----+                         
      +                                        |            \-------------- Pgl011606/54-86 (7)
      |                          /------99-----+                                      
      |                          |             \--------------------------- Pgl005304/59-98 (8)
      |             /-----91-----+                                                    
      |             |            \----------------------------------------- Pgl007797/53-91 (3)
      |             |                                                                 
      \------63-----+------------------------------------------------------ Pgl007797/4-34  (4)
                    |                                                                 
                    \------------------------------------------------------ Pgl017830/4-47  (5)