@staticmethod
def get_geofence_coordinates(policy_contract_dict):
    """
        Extract geofence coordinates from supplied policy contract.

        :param policy_contract_dict: The contract of interest
        :type policy_contract_dict: dict
        :return: latitude of geofence center
        :return: longitude of geofence center
        :return: radius of geofence
        :rtype: string
        :rtype: string
        :rtype: string
        """
    try:
        lat = policy_contract_dict['geofence']['candidate_config']['lat']
        lng = policy_contract_dict['geofence']['candidate_config']['lng']
        radius = policy_contract_dict['geofence']['candidate_config']['radius']
        return lat, lng, radius
    except KeyError:
        return None, None, None
