Question: who is the author of the book cold war
[{'answer': 'Walter Lippmann', 'provenance': [{'wikipedia_id': '325329', 'title': 'Cold War', 'start_paragraph_id': 10, 'start_character': 392, 'end_paragraph_id': 10, 'end_character': 407, 'bleu_score': 1.0, 'section': 'Section::::Origins of the term.\n'}]}, {'provenance': [{'wikipedia_id': '325329', 'title': 'Cold War', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 584, 'bleu_score': 0.9290952763452941, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17010351440102384213}, 'section': 'Section::::Origins of the term.\n'}]}]