Question: when did costa rica gain independence from spain
[{'answer': 'October 29 , 1821', 'provenance': [{'wikipedia_id': '5552', 'title': 'History of Costa Rica', 'start_paragraph_id': 21, 'start_character': 57, 'end_paragraph_id': 21, 'end_character': 76, 'bleu_score': 1.0, 'section': 'Section::::Independence from Spain.\n'}]}, {'provenance': [{'wikipedia_id': '5552', 'title': 'History of Costa Rica', 'start_paragraph_id': 21, 'start_character': 0, 'end_paragraph_id': 21, 'end_character': 273, 'bleu_score': 0.957870874785216, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7415552583983574090}, 'section': 'Section::::Independence from Spain.\n'}]}]