Question: where is the corpus callosum located in the brain
[{'answer': 'beneath the cerebral cortex', 'provenance': [{'wikipedia_id': '270014', 'title': 'Corpus callosum', 'start_paragraph_id': 1, 'start_character': 152, 'end_paragraph_id': 1, 'end_character': 179, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '270014', 'title': 'Corpus callosum', 'start_paragraph_id': 1, 'start_character': 20, 'end_paragraph_id': 1, 'end_character': 508, 'bleu_score': 0.559275566834261, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16829929880228209207}, 'section': 'Section::::Abstract.'}]}]