Question: where are red blood cells found in the body
[{'answer': 'blood', 'provenance': [{'wikipedia_id': '67158', 'title': 'Red blood cell', 'start_paragraph_id': 0, 'start_character': 4, 'end_paragraph_id': 0, 'end_character': 9, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '67158', 'title': 'Red blood cell', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 445, 'bleu_score': 0.9720210313175831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2088058439881218853}, 'section': 'Section::::Structure.:Vertebrates.\n'}]}]