Question: what article of the constitution provides that the executive power shall be vested in
[{'answer': 'Article Two', 'provenance': [{'wikipedia_id': '31647', 'title': 'Article Two of the United States Constitution', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 11, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31647', 'title': 'Article Two of the United States Constitution', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 233, 'bleu_score': 0.527897736391961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17483707884683685963}, 'section': 'Section::::Abstract.'}]}]