Question: the historical event that ushered in the beginning of the classical period
[{'answer': 'death of Alexander the Great', 'provenance': [{'wikipedia_id': '11936957', 'title': 'Classical Greece', 'start_paragraph_id': 1, 'start_character': 735, 'end_paragraph_id': 1, 'end_character': 763, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'fall of the last Athenian tyrant'}, {'provenance': [{'wikipedia_id': '11936957', 'title': 'Classical Greece', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 908, 'bleu_score': 0.962665811710344, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12478689281987786733}, 'section': 'Section::::Abstract.'}]}]