Question: who was the first president to be shot in office
[{'answer': 'Abraham Lincoln', 'provenance': [{'wikipedia_id': '574536', 'title': 'List of United States presidential assassination attempts and plots', 'start_paragraph_id': 1, 'start_character': 337, 'end_paragraph_id': 1, 'end_character': 352, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '574536', 'title': 'List of United States presidential assassination attempts and plots', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 612, 'bleu_score': 0.8490968377244571, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13603548754881435449}, 'section': 'Section::::Abstract.'}]}]