Who did Sparta defeat in the Peloponnesian war?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'INTERNAL', 'name_': 'Q19180675', 'id': 0, 'label': 'Small Brockhaus and Efron Encyclopedic Dictionary'}, {'type': 'INTERNAL', 'name_': 'Q55', 'id': 1, 'label': 'Netherlands'}, {'type': 'INTERNAL', 'name_': 'Q34370', 'id': 2, 'label': 'Rotterdam'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q1524', 'id': 3, 'label': 'Athens'}, {'type': 'INTERNAL', 'name_': 'Q9899', 'id': 4, 'label': 'Amsterdam'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q33745', 'id': 5, 'label': 'Peloponnesian War'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q209895', 'id': 6, 'label': 'Sparta Rotterdam'}, {'type': 'INTERNAL', 'name_': 'Q20434659', 'id': 7, 'label': 'Siege of Athens'}], 'links': [{'name_': 'P1343', 'source': 2, 'target': 0, 'label': 'described by source'}, {'name_': 'P17', 'source': 2, 'target': 1, 'label': 'country'}, {'name_': 'P1343', 'source': 3, 'target': 0, 'label': 'described by source'}, {'name_': 'P190', 'source': 3, 'target': 4, 'label': 'twinned administrative body'}, {'name_': 'P793', 'source': 3, 'target': 7, 'label': 'significant event'}, {'name_': 'P17', 'source': 4, 'target': 1, 'label': 'country'}, {'name_': 'P190', 'source': 4, 'target': 3, 'label': 'twinned administrative body'}, {'name_': 'P17', 'source': 6, 'target': 1, 'label': 'country'}, {'name_': 'P740', 'source': 6, 'target': 2, 'label': 'location of formation'}, {'name_': 'P276', 'source': 7, 'target': 3, 'label': 'location'}, {'name_': 'P361', 'source': 7, 'target': 5, 'label': 'part of'}]}