answerEntity: Yellowstone River
graph: {'nodes': [{'type': 'QUESTIONS_ENTITY', 'name_': 'Q46169', 'id': 0, 'label': 'national park'}, {'type': 'INTERNAL', 'name_': 'Q351', 'id': 1, 'label': 'Yellowstone National Park'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q374772', 'id': 2, 'label': 'Yellowstone River'}], 'links': [{'name_': 'P31', 'source': 1, 'target': 0, 'label': 'instance of'}, {'name_': 'P138', 'source': 1, 'target': 2, 'label': 'named after'}]}