Question: how long can a vice president stay in office
[{'answer': 'Unlimited four - year terms', 'provenance': [{'wikipedia_id': '7436762', 'title': 'Term limits in the United States', 'start_paragraph_id': 2, 'start_character': 211, 'end_paragraph_id': 2, 'end_character': 230, 'bleu_score': 0.668740304976422, 'section': 'Section::::Abstract.'}]}]