Question: what runs through the center of the vertebral column
[{'answer': 'spinal cord', 'provenance': [{'wikipedia_id': '46521228', 'title': 'Vertebra', 'start_paragraph_id': 2, 'start_character': 798, 'end_paragraph_id': 2, 'end_character': 809, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '46521228', 'title': 'Vertebra', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 809, 'bleu_score': 0.9846731957240711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9887224626797800439}, 'section': 'Section::::Abstract.'}]}]