Question: who is the current leader of the usa
[{'answer': 'Donald Trump', 'provenance': [{'wikipedia_id': '24113', 'title': 'President of the United States', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]