Question: where is the csf found in the spinal cord
[{'answer': 'the central canal', 'provenance': [{'wikipedia_id': '7632', 'title': 'Cerebrospinal fluid', 'start_paragraph_id': 2, 'start_character': 226, 'end_paragraph_id': 2, 'end_character': 243, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '7632', 'title': 'Cerebrospinal fluid', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 447, 'bleu_score': 0.9735040436119741, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 793517310864751103}, 'section': 'Section::::Abstract.'}]}]