Question: when did vatican city become its own country
[{'answer': '11 February 1929', 'provenance': [{'wikipedia_id': '32408', 'title': 'Vatican City', 'start_paragraph_id': 3, 'start_character': 292, 'end_paragraph_id': 3, 'end_character': 308, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '32408', 'title': 'Vatican City', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 373, 'bleu_score': 0.915634141845552, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3843562610351577379}, 'section': 'Section::::Name.\n'}]}]