answerEntity: Mekong River basin
graph: {'nodes': [{'type': 'QUESTIONS_ENTITY', 'name_': 'Q23397', 'id': 0, 'label': 'lake'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q46507717', 'id': 1, 'label': 'Mekong River basin'}, {'type': 'INTERNAL', 'name_': 'Q2085437', 'id': 2, 'label': 'Phayao Lake'}], 'links': [{'name_': 'P31', 'source': 2, 'target': 0, 'label': 'instance of'}, {'name_': 'P4614', 'source': 2, 'target': 1, 'label': 'drainage basin'}]}