Question: what is the title of game of thrones season 7 episode 1
[{'answer': 'Dragonstone', 'provenance': [{'wikipedia_id': '47398513', 'title': 'Game of Thrones (season 7)', 'start_paragraph_id': 38, 'start_character': 32, 'end_paragraph_id': 38, 'end_character': 43, 'bleu_score': 1.0, 'section': 'Section::::Cast.:Guest cast.:In Oldtown.\n'}]}]