def format_summary(translation):
    """ Transforms the output of the `from_batch` function
    into nicely formatted summaries.
    """
    raw_summary, _, _ = translation
    summary = raw_summary.replace('[unused0]', '').replace('[unused3]', ''
        ).replace('[PAD]', '').replace('[unused1]', '').replace(' +', ' '
        ).replace(' [unused2] ', '. ').replace('[unused2]', '').strip()
    return summary
