def bulk_data(json_string, bulk):
    """
    Check if json has bulk data/control messages. The string to check are in
    format: ``{key : [strings]}``.
    If the key/value is found return True else False

    :param dict json_string:
    :param dict bulk:
    :returns: True if found a control message and False if not.
    :rtype: bool
    """
    for key, value in bulk.items():
        if key in json_string.keys():
            for line in value:
                if json_string.get(key) == line:
                    return True
    return False