def get_event_id_missing_feature(con, table, missing_feature):
    """
    Get the a list of event ids in a given table where data is missing in a specific column (=feature
    :param con:
    :param table:
    :param missing_feature:
    :return:
    """

    query_missing_data = f"""SELECT event_id FROM {table} WHERE {missing_feature} is NULL"""

    with con.cursor() as cursor:
        cursor.execute(query_missing_data)
        list_event_ids = [dictionary.get('event_id') for dictionary in cursor.fetchall()]

    return list_event_ids