'Return a :class:`DependentPhoneNumbers
<twilio.rest.resources.DependentPhoneNumbers>` instance for the
:class:`Address <twilio.rest.resources.Address>` with the given
address_sid'

def dependent_phone_numbers(self, address_sid):

    base_uri = ('%s/Addresses/%s' % (self.account_uri, address_sid))
    return DependentPhoneNumbers(base_uri, self.auth, self.timeout)
