Question: how many articles are in the us constitution
[{'answer': 'seven', 'provenance': [{'wikipedia_id': '31644', 'title': 'Constitution of the United States', 'start_paragraph_id': 1, 'start_character': 130, 'end_paragraph_id': 1, 'end_character': 135, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31644', 'title': 'Constitution of the United States', 'start_paragraph_id': 1, 'start_character': 38, 'end_paragraph_id': 1, 'end_character': 921, 'bleu_score': 0.8165272735402871, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14626157498569663411}, 'section': 'Section::::Abstract.'}]}]