Question: how was sparta finally able to defeat athens at the end of the peloponnesian war
[{'answer': 'receiving support from Persia'}, {'provenance': [{'wikipedia_id': '24121', 'title': 'Peloponnesian War', 'start_paragraph_id': 1, 'start_character': 31, 'end_paragraph_id': 1, 'end_character': 1390, 'bleu_score': 0.9192129909423611, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13495783919021789429}, 'section': 'Section::::Abstract.'}]}]