Question: who limits the level of the nation's debt
[{'answer': 'Congress', 'provenance': [{'wikipedia_id': '31461654', 'title': 'United States debt ceiling', 'start_paragraph_id': 2, 'start_character': 380, 'end_paragraph_id': 2, 'end_character': 388, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31461654', 'title': 'United States debt ceiling', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 544, 'bleu_score': 0.9277396123251621, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6978963797757312410}, 'section': 'Section::::Background.\n'}]}]