Question: when did the siege of the alamo end
[{'answer': 'March 6 , 1836', 'provenance': [{'wikipedia_id': '18634574', 'title': 'Siege of the Alamo', 'start_paragraph_id': 1, 'start_character': 38, 'end_paragraph_id': 1, 'end_character': 52, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]