Question: who was elected president of the united states in 1860
[{'answer': 'Abraham Lincoln', 'provenance': [{'wikipedia_id': '40519', 'title': '1860 United States presidential election', 'start_paragraph_id': 1, 'start_character': 269, 'end_paragraph_id': 1, 'end_character': 284, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]