Question: when did greece become independent from the ottoman empire
[{'answer': '1832', 'provenance': [{'wikipedia_id': '200987', 'title': 'Greek War of Independence', 'start_paragraph_id': 5, 'start_character': 804, 'end_paragraph_id': 5, 'end_character': 808, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]