Question: which prime minister followed the policy of look east
[{'answer': 'P.V. Narasimha Rao', 'provenance': [{'wikipedia_id': '17677555', 'title': 'Look East policy (India)', 'start_paragraph_id': 4, 'start_character': 95, 'end_paragraph_id': 4, 'end_character': 113, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}, {'answer': 'Atal Bihari Vajpayee', 'provenance': [{'wikipedia_id': '17677555', 'title': 'Look East policy (India)', 'start_paragraph_id': 1, 'start_character': 502, 'end_paragraph_id': 1, 'end_character': 522, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Manmohan Singh', 'provenance': [{'wikipedia_id': '17677555', 'title': 'Look East policy (India)', 'start_paragraph_id': 1, 'start_character': 539, 'end_paragraph_id': 1, 'end_character': 553, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '17677555', 'title': 'Look East policy (India)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 655, 'bleu_score': 0.859655205334774, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5938640387065416394}, 'section': 'Section::::Abstract.'}]}]