code: def setUp(self):
      super(TestPennTreeBankConstituencySpanReader, self).setUp()
      self.span_width = 5
  
file_path: magnitude/pymagnitude/third_party/allennlp/tests/data/dataset_readers/penn_tree_bank_reader_test.py
imports: from __future__ import division
  from __future__ import absolute_import
  from nltk.tree import Tree
  from allennlp.data.dataset_readers import PennTreeBankConstituencySpanDatasetReader
  from allennlp.common.testing import AllenNlpTestCase
  from allennlp.data.dataset_readers.dataset_utils.span_utils import enumerate_spans
label_desc: Use image node_id 1 for calling the TestPennTreeBankConstituencySpanReader obj's underlying member method code with example usage: obj.setUp() without return types