Question: the only veins that carry oxygenated blood are the
[{'answer': 'pulmonary', 'provenance': [{'wikipedia_id': '53227', 'title': 'Vein', 'start_paragraph_id': 1, 'start_character': 150, 'end_paragraph_id': 1, 'end_character': 159, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'umbilical veins', 'provenance': [{'wikipedia_id': '53227', 'title': 'Vein', 'start_paragraph_id': 1, 'start_character': 164, 'end_paragraph_id': 1, 'end_character': 179, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '53227', 'title': 'Vein', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 294, 'bleu_score': 0.959574895300321, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2564052614929515344}, 'section': 'Section::::Abstract.'}]}]