Core Data retrieve relationships

Okay i'm pretty new to all of this but right now I'm trying to wrap my head around core data.

Right now I'm just trying to make a simple drill down type app using core data as the DB

So I have an entity called Apartments with two attributes "number" "timeStamp" and a one-to-many relationship called checklist with the cascading delete rule.

Then I have another entity called "Checklist" with attributes like "name" "timeStamp" etc.

Basically how do I list the Checklists under a specific Apartment in my view controller?

This has something to do with the fetchrequest right? I've seen dot notation used in the fetchrequest key is that what it's for?

 

Thankyou
I have a good grasp on how to use the views and and how the tableviewcontrollers work.
And yeah... Core Data is definatley not an entry level item.
I'm almost leaning to just using SQLite it seems to be alot easier to grasp IMHO

what do you think?