Question: which indian president had shortest term of office
[{'answer': 'Zakir Husain', 'provenance': [{'wikipedia_id': '290769', 'title': 'List of presidents of India', 'start_paragraph_id': 3, 'start_character': 331, 'end_paragraph_id': 3, 'end_character': 343, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]