Question: when did the first episode of game of thrones premiere
[{'answer': 'April 17 , 2011', 'provenance': [{'wikipedia_id': '31615401', 'title': 'Game of Thrones (season 1)', 'start_paragraph_id': 125, 'start_character': 70, 'end_paragraph_id': 125, 'end_character': 85, 'bleu_score': 1.0, 'section': 'Section::::Release.:Broadcast.\n'}]}, {'provenance': [{'wikipedia_id': '31615401', 'title': 'Game of Thrones (season 1)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 713, 'bleu_score': 0.8882632725054781, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1937392072446830207}, 'section': 'Section::::Abstract.'}]}]