Question: the tenure of the office of a senator in pakistan is
[{'answer': 'staggered six - year terms', 'provenance': [{'wikipedia_id': '761025', 'title': 'Senate of Pakistan', 'start_paragraph_id': 2, 'start_character': 267, 'end_paragraph_id': 2, 'end_character': 292, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '761025', 'title': 'Senate of Pakistan', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 440, 'bleu_score': 0.9720210313175831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12050852515492188348}, 'section': 'Section::::Abstract.'}]}]