This will fix #10.
The following connections have been added:

1. Crime -> Category (unidirectional, ManyToOne)
2. Crime -> Address (unidirectional, ManyToOne)
3. Criminal -> Address (unidirectional, ManyToOne)
4. Victim -> Address (unidirectional, ManyToOne)
5. Crime <-> Victim (bidirectional, ManyToMany, Crime is parent)
6. Crime <-> Criminal (bidirectional, ManyToMany, Crime is parent)