def _read_phone(text_path):
    """Read phone-level transcripts.
    Args:
        text_path (string): path to a transcript text file
    Returns:
        transcript (string): a text of transcript
    """
    # Read ground truth labels
    phone_list = []
    with open(text_path, 'r') as f:
        for line in f:
            line = line.strip().split(' ')
            phone_list.append(line[-1])
    transcript = ' '.join(phone_list)
    return transcript