Question: who is the main person in the legislative branch
[{'answer': 'Congress', 'provenance': [{'wikipedia_id': '31646', 'title': 'Article One of the United States Constitution', 'start_paragraph_id': 1, 'start_character': 126, 'end_paragraph_id': 1, 'end_character': 134, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31646', 'title': 'Article One of the United States Constitution', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 569, 'bleu_score': 0.977897140678983, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8831627437903974634}, 'section': 'Section::::Section 1: Legislative power vested in Congress.\n'}]}]