Question: when did trinidad and tobago gain its independence
[{'answer': '31 August 1962', 'provenance': [{'wikipedia_id': '3565457', 'title': 'Trinidad and Tobago', 'start_paragraph_id': 52, 'start_character': 71, 'end_paragraph_id': 52, 'end_character': 85, 'bleu_score': 1.0, 'section': 'Section::::History.:Independence.\n'}]}, {'provenance': [{'wikipedia_id': '3565457', 'title': 'Trinidad and Tobago', 'start_paragraph_id': 52, 'start_character': 0, 'end_paragraph_id': 52, 'end_character': 697, 'bleu_score': 0.9297137846207301, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7687034568205381608}, 'section': 'Section::::History.:Independence.\n'}]}]