def METHOD_NAME(s, labels, table, **unused_kwargs):
    """
    Normalizes string. For example:
    'call me at 8:00 pm!' -> 'call me at eight zero pm'
    Args:
        s: string to normalize
        labels: labels used during model training.
    Returns:
            Normalized string
    """
    def good_token(token, labels):
        s = set(labels)
        for t in token:
            if not t in s:
                return False
        return True
    try:
        text = _clean_text(s, ["english_cleaners"], table).strip()
        return ''.join([t for t in text if good_token(t, labels=labels)])
    except:
        print("WARNING: Normalizing {} failed".format(s))
        return None