code: def get_new_names_by_old():
          
          newdict = {}
  
          for label_type, label_names in Labels.LABEL_NAMES.items():
              for oldname in label_names[1:]:
                  newdict[oldname] = Labels.LABEL_NAMES[label_type][0]
          return newdict
docs: Return dictionary, new label name indexed by old label name.