Question: who played johnny brown in the unsinkable molly brown
[{'answer': 'Harve Presnell', 'provenance': [{'wikipedia_id': '210231', 'title': 'The Unsinkable Molly Brown (film)', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::Production.\n'}]}]