Question: what river was the movie maverick filmed on
[{'answer': 'Columbia River in Washington State', 'provenance': [{'wikipedia_id': '380517', 'title': 'Maverick (film)', 'start_paragraph_id': 29, 'start_character': 452, 'end_paragraph_id': 29, 'end_character': 486, 'bleu_score': 1.0, 'section': 'Section::::Production.:Vehicles.\n'}]}, {'provenance': [{'wikipedia_id': '380517', 'title': 'Maverick (film)', 'start_paragraph_id': 29, 'start_character': 0, 'end_paragraph_id': 29, 'end_character': 801, 'bleu_score': 0.9570764685495211, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12698222385995114953}, 'section': 'Section::::Production.:Vehicles.\n'}]}]