Given a dictionary from sentence -> extractions,
    return a corresponding CoNLL representation.

def convert_sent_dict_to_conll(sent_dic, domain) -> str:
    """
    Given a dictionary from sentence -> extractions,
    return a corresponding CoNLL representation.
    """
    return '\n\n'.join(['\n'.join(['\t'.join(map(str, pad_line_to_ontonotes(line, domain)))
                                   for line in convert_sent_to_conll(sent_ls)])
                        for sent_ls
                        in sent_dic.iteritems()])