Question: which prime minister of india served the shortest term
[{'answer': 'Gulzarilal Nanda', 'provenance': [{'wikipedia_id': '25240945', 'title': 'List of Prime Ministers of India by longevity', 'start_paragraph_id': 4, 'start_character': 114, 'end_paragraph_id': 4, 'end_character': 130, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]