Question: who is considered the father of the greek tragedy
[{'answer': 'Aeschylus', 'provenance': [{'wikipedia_id': '2023', 'title': 'Aeschylus', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 9, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2023', 'title': 'Aeschylus', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 456, 'bleu_score': 0.763374133343738, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3374612873864413532}, 'section': 'Section::::Abstract.'}]}]