What was the deadliest war in modern times?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'QUESTIONS_ENTITY', 'name_': 'Q198', 'id': 0, 'label': 'war'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q4476237', 'id': 1, 'label': 'Category:Wars'}], 'links': [{'name_': 'P301', 'source': 1, 'target': 0, 'label': "category's main topic"}]}