Question: when did north and south dakota became states
[{'answer': '2 , 1889', 'provenance': [{'wikipedia_id': '309547', 'title': 'Dakota Territory', 'start_paragraph_id': 18, 'start_character': 71, 'end_paragraph_id': 18, 'end_character': 79, 'bleu_score': 1.0, 'section': 'Section::::Prior to statehood.\n'}]}, {'provenance': [{'wikipedia_id': '309547', 'title': 'Dakota Territory', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 264, 'bleu_score': 0.9569637990759251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13795729227479197169}, 'section': 'Section::::Abstract.'}]}]