def not_valid(peer_id, doc_id):
    """
    There are some summaries full of dashes '-' which are not easy to be handled
    :param peer_id: The peer id of the author
    :param doc_id: The id of corresponding document
    :return: Bool True or False whether or not the summary is valid
    """

    return True if (peer_id == '31' and doc_id == 'D436') or (peer_id == '28' and doc_id == 'D347') else False