code: def unify_label(tree):
      for old, new in REMAPPING.items():
          tree = tree.replace(old, new)
  
      return tree
  
file_path: stanza/stanza/utils/datasets/constituency/vtb_convert.py
imports: import argparse
  import os
  from collections import defaultdict
  from stanza.models.constituency.tree_reader import read_trees, MixedTreeError, UnlabeledTreeError
label_desc: Use image node_id 1 for calling a global function with example usage: unify_label(tree) and returns: tree