Question: when does the game of thrones season 7 trailer come out
[{'answer': 'May 24 , 2017', 'provenance': [{'wikipedia_id': '47398513', 'title': 'Game of Thrones (season 7)', 'start_paragraph_id': 77, 'start_character': 630, 'end_paragraph_id': 77, 'end_character': 643, 'bleu_score': 1.0, 'section': 'Section::::Release.:Marketing.\n'}]}, {'provenance': [{'wikipedia_id': '47398513', 'title': 'Game of Thrones (season 7)', 'start_paragraph_id': 77, 'start_character': 0, 'end_paragraph_id': 77, 'end_character': 954, 'bleu_score': 0.9881300380564421, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11428888278816738753}, 'section': 'Section::::Release.:Marketing.\n'}]}]