What book is the first volume in George R. R. Martin's cycle of novels?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'QUESTIONS_ENTITY', 'name_': 'Q181677', 'id': 0, 'label': 'George R. R. Martin'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q368224', 'id': 1, 'label': 'Tad Williams'}, {'type': 'INTERNAL', 'name_': 'Q6517916', 'id': 2, 'label': 'Legends II'}], 'links': [{'name_': 'P50', 'source': 2, 'target': 0, 'label': 'author'}, {'name_': 'P50', 'source': 2, 'target': 1, 'label': 'author'}]}