Question: when did haiti and the dominican republic split
[{'answer': 'February 27 , 1844', 'provenance': [{'wikipedia_id': '39184282', 'title': 'Dominican Republic–Haiti relations', 'start_paragraph_id': 14, 'start_character': 3, 'end_paragraph_id': 14, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::History.:Dominican War of Independence (1844–1856).\n'}]}]