Question: who was known for his policy of massive retaliation and his approach to war called brinkmanship
[{'answer': 'Adlai Stevenson', 'provenance': [{'wikipedia_id': '241187', 'title': 'Brinkmanship', 'start_paragraph_id': 3, 'start_character': 108, 'end_paragraph_id': 3, 'end_character': 123, 'bleu_score': 1.0, 'section': 'Section::::Origins.\n'}]}, {'provenance': [{'wikipedia_id': '241187', 'title': 'Brinkmanship', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 896, 'bleu_score': 0.9870543337942441, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2452622363510546766}, 'section': 'Section::::Origins.\n'}]}]