Question: when were the three estates of france established
[{'answer': 'the medieval period', 'provenance': [{'wikipedia_id': '393404', 'title': 'Estates of the realm', 'start_paragraph_id': 1, 'start_character': 130, 'end_paragraph_id': 1, 'end_character': 149, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '393404', 'title': 'Estates of the realm', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 265, 'bleu_score': 0.9517713210466091, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6961992124002072255}, 'section': 'Section::::Abstract.'}]}]