code: def paracrawl_v3_pairs(paracrawl_file):
    
    raw_sentences = _raw_sentences(paracrawl_file)
    for s_en in raw_sentences:
      try:
        s_xx = next(raw_sentences)
        if s_en and s_xx:  # Prevent empty string examples.
          yield s_en, s_xx
      except StopIteration:
        tf.logging.error(
            'Unmatched final sentence while reading in sentence pairs: [%s]',
            s_en)
docs: Generates raw (English, other) pairs from a ParaCrawl V3.0 data file.
  
    Args:
      paracrawl_file: A ParaCrawl V3.0 en-.. data file.
    Yields:
      Pairs of (sentence_en, sentence_xx), as Unicode strings.
    Raises:
      StopIteration: If the file ends while this method is in the middle of
          creating a translation pair.