Question: who is the sixth president of the united states
[{'answer': 'John Quincy Adams', 'provenance': [{'wikipedia_id': '15654', 'title': 'John Quincy Adams', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '15654', 'title': 'John Quincy Adams', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 185, 'bleu_score': 0.833610442344303}]}, {'provenance': [{'wikipedia_id': '15654', 'title': 'John Quincy Adams', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 167, 'bleu_score': 0.8105932471967201}]}]