Question: when did the battle of salamis take place
[{'answer': '480 BC', 'provenance': [{'wikipedia_id': '47968', 'title': 'Battle of Salamis', 'start_paragraph_id': 1, 'start_character': 184, 'end_paragraph_id': 1, 'end_character': 190, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '47968', 'title': 'Battle of Salamis', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 436, 'bleu_score': 0.880140692382787, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 710318037113534105}, 'section': 'Section::::Abstract.'}]}]