Question: who played john wayne's son in rio grande
[{'answer': 'Claude Jarman Jr .', 'provenance': [{'wikipedia_id': '690868', 'title': 'Rio Grande (film)', 'start_paragraph_id': 5, 'start_character': 99, 'end_paragraph_id': 5, 'end_character': 115, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '690868', 'title': 'Rio Grande (film)', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 760, 'bleu_score': 0.9855586187885531, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6144504347197300998}, 'section': 'Section::::Plot.\n'}]}]