Question: who is the first president of united state of america
[{'answer': 'George Washington', 'provenance': [{'wikipedia_id': '19908980', 'title': 'List of Presidents of the United States', 'start_paragraph_id': 2, 'start_character': 86, 'end_paragraph_id': 2, 'end_character': 103, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19908980', 'title': 'List of Presidents of the United States', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 483, 'bleu_score': 0.516790179561299, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7605147156603116132}, 'section': 'Section::::Abstract.'}]}]