Retrieves the description of the incident/incidents from the output
        response

        Returns:
            description(namedtuple): List of named tuples of descriptions of
            the incident/incidents

def description(self):
        """Retrieves the description of the incident/incidents from the output
        response

        Returns:
            description(namedtuple): List of named tuples of descriptions of
            the incident/incidents
        """
        resource_list = self.traffic_incident()
        description = namedtuple('description', 'description')
        if len(resource_list) == 1 and resource_list[0] is None:
            return None
        else:
            try:
                return [description(resource['description'])
                        for resource in resource_list]
            except (KeyError, TypeError):
                try:
                    return [description(resource['Description'])
                            for resource in resource_list]
                except KeyError:
                    return None