code: def get_times_from_utterance(utterance: str,
                               char_offset_to_token_index: Dict[int, int],
                               indices_of_approximate_words: Set[int]) -> Dict[str, List[int]]:
      
  
      pm_linking_dict = _time_regex_match(r'\d+pm',
                                          utterance,
                                          char_offset_to_token_index,
                                          pm_map_match_to_query_value,
                                          indices_of_approximate_words)
  
      am_linking_dict = _time_regex_match(r'\d+am',
                                          utterance,
                                          char_offset_to_token_index,
                                          am_map_match_to_query_value,
                                          indices_of_approximate_words)
  
      oclock_linking_dict = _time_regex_match(r"\d+ o'clock",
                                              utterance,
                                              char_offset_to_token_index,
                                              lambda match: digit_to_query_time(match.rstrip(" o'clock")),
                                              indices_of_approximate_words)
  
      hours_linking_dict = _time_regex_match(r"\d+ hours",
                                             utterance,
                                             char_offset_to_token_index,
                                             lambda match: [int(match.rstrip(" hours"))],
                                             indices_of_approximate_words)
  
  
      times_linking_dict: Dict[str, List[int]] = defaultdict(list)
      linking_dicts = [pm_linking_dict, am_linking_dict, oclock_linking_dict, hours_linking_dict]
  
      for linking_dict in linking_dicts:
          for key, value in linking_dict.items():
              times_linking_dict[key].extend(value)
  
      return times_linking_dict
docs: Given an utterance, we get the numbers that correspond to times and convert them to
      values that may appear in the query. For example: convert ``7pm`` to ``1900``.