Question: where was season 3 episode 4 of black mirror filmed
[{'answer': 'Iceland', 'provenance': [{'wikipedia_id': '55024666', 'title': 'Crocodile (Black Mirror)', 'start_paragraph_id': 2, 'start_character': 10, 'end_paragraph_id': 2, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '55024666', 'title': 'Crocodile (Black Mirror)', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 529, 'bleu_score': 0.9776501033621461, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11095502656575844554}, 'section': 'Section::::Abstract.'}]}]