Question: who is the current president pro tempore of the senate 2017
[{'answer': 'Utah Republican Orrin Hatch'}, {'provenance': [{'wikipedia_id': '49565', 'title': 'President pro tempore of the United States Senate', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 158, 'bleu_score': 0.507871805867499, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7152896047171261270}, 'section': 'Section::::Abstract.'}]}]