Which writer asked his lifelong friend Max Brod to burn all his unpublished manuscripts?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q905', 'id': 0, 'label': 'Franz Kafka'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q28480', 'id': 1, 'label': 'Max Brod'}, {'type': 'INTERNAL', 'name_': 'Q78891', 'id': 2, 'label': 'Hugo Bergmann'}], 'links': [{'name_': 'P737', 'source': 2, 'target': 0, 'label': 'influenced by'}, {'name_': 'P737', 'source': 2, 'target': 1, 'label': 'influenced by'}]}