Question: hole in the tube surrounding the spinal cord
[{'answer': 'the small central canal', 'provenance': [{'wikipedia_id': '21294842', 'title': 'Spinal cord', 'start_paragraph_id': 29, 'start_character': 1223, 'end_paragraph_id': 29, 'end_character': 1246, 'bleu_score': 1.0, 'section': 'Section::::Structure.:Development.\n'}]}, {'provenance': [{'wikipedia_id': '21294842', 'title': 'Spinal cord', 'start_paragraph_id': 29, 'start_character': 0, 'end_paragraph_id': 29, 'end_character': 1338, 'bleu_score': 0.75726084232749, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16975206968679252901}, 'section': 'Section::::Structure.:Development.\n'}]}]