def systemEventDF(token='<STR_LIT>', version='<STR_LIT>'):
df = pd.io.json.json_normalize(systemEvent(token, version))<EOL>_toDatetime(df)<EOL>return df<EOL>
The System event message is used to indicate events that apply to the market or the data feed.

    There will be a single message disseminated per channel for each System Event type within a given trading session.

    https://iexcloud.io/docs/api/#deep-system-event

    Args:
        token (string); Access token
        version (string); API version

    Returns:
        DataFrame: result