Question: when did texas win their independence from mexico
[{'answer': 'April 21 , 1836', 'provenance': [{'wikipedia_id': '38711', 'title': 'Texas Revolution', 'start_paragraph_id': 1, 'start_character': 40, 'end_paragraph_id': 1, 'end_character': 55, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '38711', 'title': 'Texas Revolution', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 870, 'bleu_score': 0.9855586187885531, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12011486074519224561}, 'section': 'Section::::Abstract.'}]}]