Question: where was the sons of katie elder filmed at
[{'answer': 'Durango , in northern Mexico', 'provenance': [{'wikipedia_id': '5718787', 'title': 'The Sons of Katie Elder', 'start_paragraph_id': 39, 'start_character': 33, 'end_paragraph_id': 39, 'end_character': 61, 'bleu_score': 1.0, 'section': 'Section::::Production.:Shooting.\n'}]}, {'answer': 'Denver and Rio Grande Western Railroad ( now a scenic tourist train ) near Royal Gorge , Colorado , United States'}, {'provenance': [{'wikipedia_id': '5718787', 'title': 'The Sons of Katie Elder', 'start_paragraph_id': 39, 'start_character': 0, 'end_paragraph_id': 39, 'end_character': 250, 'bleu_score': 0.8492988135354751, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5630582907664072794}, 'section': 'Section::::Production.:Shooting.\n'}]}]