So far, you have worked on the persistence layer of your app. The next step is to create your models so you can actually store and retrieve data from your Core Data database. All models in an application that uses Core Data are represented by NSManagedObject subclasses. When you retrieve data from your database, NSManagedObjectContext is responsible for creating instances of your managed objects and populating them with the relevant fetched data.

The MustC application requires two models: a family-member model and a movie model. When you define models, you can also define relationships. For the models in MustC, you should define a relationship that links multiple movies to a single family member.