Question: how long does a member of congress have to serve to get a pension
[{'answer': 'five ( 5 ) years', 'provenance': [{'wikipedia_id': '9962001', 'title': 'Congressional pension', 'start_paragraph_id': 1, 'start_character': 172, 'end_paragraph_id': 1, 'end_character': 189, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '9962001', 'title': 'Congressional pension', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 921, 'bleu_score': 0.9863473221773311, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8571896577609654349}, 'section': 'Section::::Abstract.'}]}]