code: def test_evalb_correctly_scores_identical_trees(self):
      tree1 = Tree.fromstring(
          "(S (NP (D the) (N dog)) (VP (V chased) (NP (D the) (N cat))))"
      )
      tree2 = Tree.fromstring(
          "(S (NP (D the) (N dog)) (VP (V chased) (NP (D the) (N cat))))"
      )
      evalb_scorer = EvalbBracketingScorer()
      evalb_scorer([tree1], [tree2])
      metrics = evalb_scorer.get_metric()
      assert metrics["evalb_recall"] == 1.0
      assert metrics["evalb_precision"] == 1.0
      assert metrics["evalb_f1_measure"] == 1.0
  
file_path: magnitude/pymagnitude/third_party/allennlp/tests/training/metrics/evalb_bracketing_scorer_test.py
imports: from __future__ import absolute_import
  from nltk import Tree
  from allennlp.common.testing import AllenNlpTestCase
  from allennlp.training.metrics import EvalbBracketingScorer
label_desc: Use image node_id 3 for calling the EvalbBracketingScorerTest obj's underlying member method code with example usage: obj.test_evalb_correctly_scores_identical_trees() without return types