def get_base_target_link(experiment_config):
    """Returns the base of the target link for this experiment so that
    get_instance_from_preempted_operation can return the instance."""
    return ('https://www.googleapis.com/compute/v1/projects/{project}/zones/'
            '{zone}/instances/').format(
                project=experiment_config['cloud_project'],
                zone=experiment_config['cloud_compute_zone'])