Question: the great majority of which tracts pass through the corpus callosum
[{'answer': 'commissural fibers', 'provenance': [{'wikipedia_id': '5269054', 'title': 'Commissural fiber', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 22, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5269054', 'title': 'Commissural fiber', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 125, 'bleu_score': 0.8914703664390791, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8734924139159723742}, 'section': 'Section::::Structure.\n'}]}]