Question: when did northern ireland and southern ireland separate
[{'answer': '3 May 1921', 'provenance': [{'wikipedia_id': '2710637', 'title': 'Partition of Ireland', 'start_paragraph_id': 1, 'start_character': 138, 'end_paragraph_id': 1, 'end_character': 148, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2710637', 'title': 'Partition of Ireland', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 386, 'bleu_score': 0.8083287730370201, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5503831509779734868}, 'section': 'Section::::Abstract.'}]}]