Who played the main character in Titanic who did not die in freezing water?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'INTERNAL', 'name_': 'Q30', 'id': 0, 'label': 'United States of America'}, {'type': 'INTERNAL', 'name_': 'Q6581097', 'id': 1, 'label': 'male'}, {'type': 'INTERNAL', 'name_': 'Q7546', 'id': 2, 'label': 'Ingmar Bergman'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q900414', 'id': 3, 'label': 'César Award for Best Foreign Film'}, {'type': 'INTERNAL', 'name_': 'Q2071', 'id': 4, 'label': 'David Lynch'}, {'type': 'INTERNAL', 'name_': 'Q190588', 'id': 5, 'label': 'Love Actually'}, {'type': 'INTERNAL', 'name_': 'Q3805567', 'id': 6, 'label': 'Jack Dawson'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q44578', 'id': 7, 'label': 'Titanic'}], 'links': [{'name_': 'P17', 'source': 0, 'target': 0, 'label': 'country'}, {'name_': 'P21', 'source': 2, 'target': 1, 'label': 'sex or gender'}, {'name_': 'P1411', 'source': 2, 'target': 3, 'label': 'nominated for'}, {'name_': 'P27', 'source': 4, 'target': 0, 'label': 'country of citizenship'}, {'name_': 'P21', 'source': 4, 'target': 1, 'label': 'sex or gender'}, {'name_': 'P166', 'source': 4, 'target': 3, 'label': 'award received'}, {'name_': 'P495', 'source': 5, 'target': 0, 'label': 'country of origin'}, {'name_': 'P8371', 'source': 5, 'target': 7, 'label': 'references work, tradition or theory'}, {'name_': 'P27', 'source': 6, 'target': 0, 'label': 'country of citizenship'}, {'name_': 'P21', 'source': 6, 'target': 1, 'label': 'sex or gender'}, {'name_': 'P1441', 'source': 6, 'target': 7, 'label': 'present in work'}]}