Question: when does the presiding officer of the senate vote
[{'answer': 'to break ties', 'provenance': [{'wikipedia_id': '5626102', 'title': 'Presiding Officer of the United States Senate', 'start_paragraph_id': 6, 'start_character': 269, 'end_paragraph_id': 6, 'end_character': 282, 'bleu_score': 1.0, 'section': 'Section::::Constitutional authority.\n'}]}, {'provenance': [{'wikipedia_id': '5626102', 'title': 'Presiding Officer of the United States Senate', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 985, 'bleu_score': 0.9428685524259781, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18116160962943244933}, 'section': 'Section::::Constitutional authority.\n'}]}]