Question: who has had the shortest reign of the nine irish presidents to date
[{'answer': 'Erskine Childers', 'provenance': [{'wikipedia_id': '24676', 'title': 'President of Ireland', 'start_paragraph_id': 113, 'start_character': 12, 'end_paragraph_id': 113, 'end_character': 28, 'bleu_score': 1.0, 'section': 'Section::::List of presidents of Ireland.:Statistics.\n'}]}, {'provenance': [{'wikipedia_id': '24676', 'title': 'President of Ireland', 'start_paragraph_id': 113, 'start_character': 0, 'end_paragraph_id': 113, 'end_character': 89, 'bleu_score': 0.850733133512352, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4737761111119691899}, 'section': 'Section::::List of presidents of Ireland.:Statistics.\n'}]}]