Question: who serves as the president of texas's senate
[{'answer': 'Dan Patrick', 'provenance': [{'wikipedia_id': '523631', 'title': 'Texas Senate', 'start_paragraph_id': 6, 'start_character': 543, 'end_paragraph_id': 6, 'end_character': 554, 'bleu_score': 1.0, 'section': 'Section::::Leadership.\n'}]}]