coredata NSFetchRequest one to many relationship Relationship fault on managed object

I have a coredata project with the following entities:

I'm trying to get the list of the content base on the category:

here is my coredata clasess .h:

@interface Content : NSManagedObject

@property (nonatomic, retain) NSString * contenido;
@property (nonatomic, retain) NSNumber * index;
@property (nonatomic, retain) NSString * titulo;
@property (nonatomic, retain) NSNumber * uploadCloudKit;
@property (nonatomic, retain) Categories *category;

---

@class Content;

@interface Categories : NSManagedObject

@property (nonatomic, retain) NSString * categoryName;
@property (nonatomic, retain) NSSet *content;
@end



NSEntityDescription *categoryDescription = [ NSEntityDescription entityForName:@"Categories" inManagedObjectContext:moc];

NSFetchRequest *categoRequest = [NSFetchRequest new];
categoRequest.entity = categoryDescription;
NSPredicate *categoPredicate = [NSPredicate predicateWithFormat:@"categoryName like %@", category];
categoRequest.predicate = categoPredicate;
 NSArray *results = [moc executeFetchRequest:categoRequest error:&error];

but when I try to access the content on the result for the category I get:

po [results valueForKey:@"content"]
<__NSArrayI 0x6080000243a0>(
Relationship 'content' fault on managed object (0x6080000a2220) <Categories: 0x6080000a2220> (entity: Categories; id: 0x40002b <x-coredata://FDBA3FB2-F1F8-498E-9071-3A5D1ABE66F0/Categories/p1> ; data: {
    categoryName = movies;
    content = "<relationship fault: 0x610000030fa0 'content'>";
})
)

Any of you knows how can I get the content items of the result?

I'll really appreciate your help