Question: what do we call the leader of the senate
[{'answer': 'Senate Majority and Minority Leaders', 'provenance': [{'wikipedia_id': '46507', 'title': 'Party leaders of the United States Senate', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 40, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '46507', 'title': 'Party leaders of the United States Senate', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 512, 'bleu_score': 0.9321992460304711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3649213171102146223}, 'section': 'Section::::Abstract.'}]}]