Question: when did the south of ireland became independent from britain
[{'answer': '6 December 1922', 'provenance': [{'wikipedia_id': '14560', 'title': 'Republic of Ireland', 'start_paragraph_id': 10, 'start_character': 47, 'end_paragraph_id': 10, 'end_character': 62, 'bleu_score': 1.0, 'section': 'Section::::History.:Home-rule movement.\n'}]}, {'provenance': [{'wikipedia_id': '14560', 'title': 'Republic of Ireland', 'start_paragraph_id': 19, 'start_character': 0, 'end_paragraph_id': 19, 'end_character': 1149, 'bleu_score': 0.9894455409323081, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 507111984655959742}, 'section': 'Section::::History.:Revolution and steps to independence.\n'}]}]