code: def load_labeled_intervals(filename, delimiter=r'\s+'):
      r
      # Use our universal function to load in the events
      starts, ends, labels = load_delimited(filename, [float, float, str],
                                            delimiter)
      # Stack into an interval matrix
      intervals = np.array([starts, ends]).T
      # Validate them, but throw a warning in place of an error
      try:
          util.validate_intervals(intervals)
      except ValueError as error:
          warnings.warn(error.args[0])
  
      return intervals, labels
docs: r"""Import labeled intervals from an annotation file.  The file should consist
      of three columns: Two consisting of numeric values corresponding to start
      and end time of each interval and a third corresponding to the label of
      each interval.  This is primarily useful for processing events which span a
      duration, such as segmentation, chords, or instrument activation.
  
      Parameters
      ----------
      filename : str
          Path to the annotation file
      delimiter : str
          Separator regular expression.
          By default, lines will be split by any amount of whitespace.
  
      Returns
      -------
      intervals : np.ndarray, shape=(n_events, 2)
          array of event start and end time
      labels : list of str
          list of labels