Question: where does congress get its lawmaking powers from
[{'answer': 'United States Constitution', 'provenance': [{'wikipedia_id': '28880664', 'title': 'Powers of the United States Congress', 'start_paragraph_id': 1, 'start_character': 60, 'end_paragraph_id': 1, 'end_character': 86, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '28880664', 'title': 'Powers of the United States Congress', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 411, 'bleu_score': 0.970795021215021, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16092136960458706748}, 'section': 'Section::::Abstract.'}]}]