you can define a new repetable component for cast which will have actor(one to one relation) and role and link this component with movie collection. In this way if one actor play 2 roles, you can add 2 rows for same actor and different roles.
you can define a new repetable component for cast which will have actor(one to one relation) and role and link this component with movie collection. In this way if one actor play 2 roles, you can add 2 rows for same actor and different roles.