Question: where is the major cardiovascular center in the cns
[{'answer': 'the medulla oblongata', 'provenance': [{'wikipedia_id': '1057890', 'title': 'Cardiovascular centre', 'start_paragraph_id': 1, 'start_character': 181, 'end_paragraph_id': 1, 'end_character': 202, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1057890', 'title': 'Cardiovascular centre', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 443, 'bleu_score': 0.9716239638199891, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17168354770217907403}, 'section': 'Section::::Abstract.'}]}]