In [1]: from councilmatic_core.models import Organization
In [2]: o = Organization.objects.filter(memberships__isnull=False).first()
In [3]: o.memberships.first()
Out[3]: <Membership: Daley, Richard M. in City of Chicago (Mayor)>
In [4]: type(o.memberships.first())
Out[4]: councilmatic_core.models.Membership