code: def test_construct_tree_from_spans(self):
      # (S (NP (D the) (N dog)) (VP (V chased) (NP (D the) (N cat))))
      tree_spans = [
          ((0, 1), "D"),
          ((1, 2), "N"),
          ((0, 2), "NP"),
          ((2, 3), "V"),
          ((3, 4), "D"),
          ((4, 5), "N"),
          ((3, 5), "NP"),
          ((2, 5), "VP"),
          ((0, 5), "S"),
      ]
      sentence = ["the", "dog", "chased", "the", "cat"]
      tree = self.model.construct_tree_from_spans(
          dict((x, y) for x, y in tree_spans), sentence
      )
      correct_tree = Tree.fromstring(
          "(S (NP (D the) (N dog)) (VP (V chased) (NP (D the) (N cat))))"
      )
      assert tree == correct_tree
  
file_path: magnitude/pymagnitude/third_party/allennlp/tests/models/constituency_parser_test.py
imports: from __future__ import division
  from __future__ import absolute_import
  from nltk import Tree
  import torch
  from allennlp.common.testing.model_test_case import ModelTestCase
  from allennlp.models.constituency_parser import SpanInformation
  from allennlp.training.metrics import EvalbBracketingScorer
label_desc: Use image node_id 8 for calling the SpanConstituencyParserTest obj's underlying member method code with example usage: obj.test_construct_tree_from_spans() without return types