Question: who was the first president to get assasinated
[{'answer': 'Lincoln', 'provenance': [{'wikipedia_id': '286369', 'title': 'Assassination of John F. Kennedy', 'start_paragraph_id': 3, 'start_character': 281, 'end_paragraph_id': 3, 'end_character': 288, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]