Question: where did they film secret life of walter mitty
[{'answer': 'Vatnajökull National Park', 'provenance': [{'wikipedia_id': '39246316', 'title': 'The Secret Life of Walter Mitty (2013 film)', 'start_paragraph_id': 38, 'start_character': 378, 'end_paragraph_id': 38, 'end_character': 403, 'bleu_score': 1.0, 'section': 'Section::::Production.:Pre-production.\n'}]}, {'answer': 'Grundarfjörður'}, {'answer': 'Seyðisfjörður', 'provenance': [{'wikipedia_id': '39246316', 'title': 'The Secret Life of Walter Mitty (2013 film)', 'start_paragraph_id': 38, 'start_character': 239, 'end_paragraph_id': 38, 'end_character': 252, 'bleu_score': 1.0, 'section': 'Section::::Production.:Pre-production.\n'}]}, {'answer': 'Höfn', 'provenance': [{'wikipedia_id': '39246316', 'title': 'The Secret Life of Walter Mitty (2013 film)', 'start_paragraph_id': 38, 'start_character': 140, 'end_paragraph_id': 38, 'end_character': 144, 'bleu_score': 1.0, 'section': 'Section::::Production.:Pre-production.\n'}]}, {'answer': 'Stykkishólmur', 'provenance': [{'wikipedia_id': '39246316', 'title': 'The Secret Life of Walter Mitty (2013 film)', 'start_paragraph_id': 38, 'start_character': 70, 'end_paragraph_id': 38, 'end_character': 83, 'bleu_score': 1.0, 'section': 'Section::::Production.:Pre-production.\n'}]}, {'answer': 'Time - Life Building'}]