Laravel - Seed with relationship (Real data)

I'm trying to seed my table with some data with belongsTo relationship but I don't know how I should do this relationship. Can anybody tell me how an belongsTo relationship should look like with seeding real data?

Seeding file:

public function run()
{
    CarSchema::create([
        'type_of_car' => 'small',
        'horse_power' => 98,
        'brand'       => 3 // Want to get the brand of id 3 here
    ])
 }

The result I want is that "brand" is what corresponds to id 3 in the brand table so in the front End I've got the brand as well and not just the id of it.

via Chebli Mohamed