Which of Winston Churchill's children did not live past the age of 5?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'QUESTIONS_ENTITY', 'name_': 'Q8016', 'id': 0, 'label': 'Winston Churchill'}, {'type': 'INTERNAL', 'name_': 'Q243011', 'id': 1, 'label': 'Lady Randolph Churchill'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q721915', 'id': 2, 'label': 'Jack Churchill'}], 'links': [{'name_': 'P40', 'source': 1, 'target': 0, 'label': 'child'}, {'name_': 'P40', 'source': 1, 'target': 2, 'label': 'child'}]}