Question: who wrote game of thrones season 7 episode 6
[{'answer': 'David Benioff', 'provenance': [{'wikipedia_id': '47398513', 'title': 'Game of Thrones (season 7)', 'start_paragraph_id': 1, 'start_character': 564, 'end_paragraph_id': 1, 'end_character': 577, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'D.B. Weiss'}]