Question: which article states the constitution is the supreme law of land
[{'answer': 'Article VI , Clause 2', 'provenance': [{'wikipedia_id': '33730953', 'title': 'Supremacy Clause', 'start_paragraph_id': 1, 'start_character': 63, 'end_paragraph_id': 1, 'end_character': 84, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '33730953', 'title': 'Supremacy Clause', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 1299, 'bleu_score': 0.953456298422766, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18240124239564800508}, 'section': 'Section::::Abstract.'}]}]