Question: where are rod cells located in the retina
[{'answer': 'outer edges of the retina', 'provenance': [{'wikipedia_id': '514355', 'title': 'Rod cell', 'start_paragraph_id': 1, 'start_character': 199, 'end_paragraph_id': 1, 'end_character': 224, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '514355', 'title': 'Rod cell', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 546, 'bleu_score': 0.8836548016902551, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7853149830697277498}, 'section': 'Section::::Abstract.'}]}]