Question: how long is the term for a us senator
[{'answer': 'six years', 'provenance': [{'wikipedia_id': '24909346', 'title': 'United States Senate', 'start_paragraph_id': 2, 'start_character': 314, 'end_paragraph_id': 2, 'end_character': 323, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '24909346', 'title': 'United States Senate', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 598, 'bleu_score': 0.613394366241753, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5754896380588376088}, 'section': 'Section::::Abstract.'}]}]