Question: who did the 49ers beat in the super bowls
[{'answer': 'Cincinnati Bengals', 'provenance': [{'wikipedia_id': '27169', 'title': 'San Francisco 49ers', 'start_paragraph_id': 21, 'start_character': 104, 'end_paragraph_id': 21, 'end_character': 122, 'bleu_score': 1.0, 'section': 'Section::::Franchise history.:1946–1978: Early years.\n'}]}, {'answer': 'Miami Dolphins', 'provenance': [{'wikipedia_id': '27169', 'title': 'San Francisco 49ers', 'start_paragraph_id': 20, 'start_character': 1085, 'end_paragraph_id': 20, 'end_character': 1099, 'bleu_score': 1.0, 'section': 'Section::::Franchise history.:1946–1978: Early years.\n'}]}, {'answer': 'Denver Broncos', 'provenance': [{'wikipedia_id': '27169', 'title': 'San Francisco 49ers', 'start_paragraph_id': 45, 'start_character': 315, 'end_paragraph_id': 45, 'end_character': 329, 'bleu_score': 1.0, 'section': 'Section::::Franchise history.:1988–1989: Back-to-back Super Bowls.\n'}]}, {'answer': 'San Diego Chargers', 'provenance': [{'wikipedia_id': '27169', 'title': 'San Francisco 49ers', 'start_paragraph_id': 25, 'start_character': 696, 'end_paragraph_id': 25, 'end_character': 714, 'bleu_score': 1.0, 'section': 'Section::::Franchise history.:1979–1980: Arrival of Bill Walsh and Joe Montana.\n'}]}, {'provenance': [{'wikipedia_id': '27169', 'title': 'San Francisco 49ers', 'section': 'Section::::Franchise history.:1979–1980: Arrival of Bill Walsh and Joe Montana.\n', 'start_paragraph_id': 25, 'end_paragraph_id': 25, 'meta': {'evidence_span': ['(The other West Coast offensemore focused on the vertical, or downfield, passing gamewas actually created by 1960s L.A. / San Diego coach Sid Gillman, and San Diego State coach Don Coryell, who also employed a version of it as head coach of the St. Louis (football) Cardinals and San Diego Chargers during a period where it garnered the nickname "Air Coryell".)', 'Bengals']}}]}]