Question: when did the golden age of athens start
[{'answer': '480 BC'}, {'provenance': [{'wikipedia_id': '208579', 'title': 'Fifth-century Athens', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 1394, 'bleu_score': 0.9392105102217101, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11674431948359139224}, 'section': 'Section::::Abstract.'}]}]