Question: who is the presiding officer of the texas senate
[{'answer': 'Dan Patrick', 'provenance': [{'wikipedia_id': '893871', 'title': 'Lieutenant Governor of Texas', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 11, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]