Question: when did the 49ers move to candlestick park
[{'answer': '1971', 'provenance': [{'wikipedia_id': '173970', 'title': 'Candlestick Park', 'start_paragraph_id': 1, 'start_character': 430, 'end_paragraph_id': 1, 'end_character': 434, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '173970', 'title': 'Candlestick Park', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 522, 'bleu_score': 0.8864895294109221, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5893992696756010693}, 'section': 'Section::::Abstract.'}]}]