[PERSON]
              |
    __________|__________
   |                     |
   |                     |
[EMPLOYEE]           [CUSTOMER]
   |1                    |1
   |                     |
   | organises           | attends
   |(organisedBy)        | (isAttendedBy)
   |                     |
   |*                    |*
    ------[EVENTS]-------

CREATE TABLE Person_TBL of Person (Person# PRIMARY KEY)
NESTED TABLE organises STORE AS EventListType;