def get_cve_id(cve):
    """
    Attempts to extract the cve id from the provided cve.
    If none is found, returns a blank string.

    Parameters
    ----------
    cve : dict
        The dictionary generated from the CVE json.

    Returns
    -------
    str
        This will be either the cve id, or a blank string.
    """
    cve_id = ""
    if "CVE_data_meta" in cve and "ID" in cve["CVE_data_meta"]:
        cve_id = cve["CVE_data_meta"]["ID"].lower()
    return cve_id