Question: who played stadler in mr holland's opus
[{'answer': 'Balthazar Getty', 'provenance': [{'wikipedia_id': '171076', 'title': "Mr. Holland's Opus", 'start_paragraph_id': 27, 'start_character': 12, 'end_paragraph_id': 27, 'end_character': 27, 'bleu_score': 1.0, 'section': 'Section::::Cast.\n'}]}, {'provenance': [{'wikipedia_id': '171076', 'title': "Mr. Holland's Opus", 'start_paragraph_id': 27, 'start_character': 0, 'end_paragraph_id': 27, 'end_character': 38, 'bleu_score': 0.5081327481546141, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1982556975674994724}, 'section': 'Section::::Cast.\n'}]}]