def prepare_patstat(dfs):
    """Get patent application IDs and patent descriptions that are written in English

    Args:
        dfs (:obj:`dict` of :obj:`pd.DataFrame`) PATSTAT tables.

    Return:
        (:obj:`pd.DataFrame`)

    """
    return dfs["appln_abstr"][dfs["appln_abstr"].appln_abstract_lg == "en"]