How to display that forms?

[galago]

I'm thinking how to display forms in that configuration:
I have 3 simple models:
class Province(models.Model):
    name = models.CharField(max_length=30)
    slug = models.SlugField(max_length=30, unique=True)

class UserProvince(models.Model):
    user = models.ForeignKey(User)
    province = models.ForeignKey(Province)

class UserCity(models.Model):
    user = models.ForeignKey(User)
    province = models.ForeignKey(Province)
    city = models.CharField(max_length=10)
    slug = models.SlugField(max_length=100, editable=False)


now, each user can have several provinces added. then, he can add several 
cities to his each added province.
province1
    city1
    city2
    city3
province2
    city4
    city5
    city6
province3
    city7
    city8
    city9

I want to display all his provinces and under each of it, I want to display 
form with input to add city to it. What is the best way to do this? There's 
going to be unknown number of provinces.

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