Question: how many settings does a greek tragedy have
[{'answer': 'one', 'provenance': [{'wikipedia_id': '631802', 'title': 'Greek tragedy', 'start_paragraph_id': 16, 'start_character': 31, 'end_paragraph_id': 16, 'end_character': 34, 'bleu_score': 1.0, 'section': 'Section::::The evolution of tragedy.:Origin of tragedy.\n'}]}, {'provenance': [{'wikipedia_id': '631802', 'title': 'Greek tragedy', 'start_paragraph_id': 55, 'start_character': 0, 'end_paragraph_id': 55, 'end_character': 171, 'bleu_score': 0.9271474438253491, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6209967982812144549}, 'section': 'Section::::Greek tragedy in dramatic theory.:The three unities.\n'}]}]