Question: when did dominican republic gain independence from spain
[{'answer': '1821', 'provenance': [{'wikipedia_id': '2165902', 'title': 'Dominican War of Independence', 'start_paragraph_id': 1, 'start_character': 407, 'end_paragraph_id': 1, 'end_character': 411, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2165902', 'title': 'Dominican War of Independence', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 451, 'bleu_score': 0.7888345113273181, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11441331088518834048}, 'section': 'Section::::Abstract.'}]}]