Question: who was the third president of the united states
[{'answer': 'Thomas Jefferson', 'provenance': [{'wikipedia_id': '19908980', 'title': 'List of Presidents of the United States', 'start_paragraph_id': 5, 'start_character': 366, 'end_paragraph_id': 5, 'end_character': 382, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]