Question: who sang the vocals for the movie rockstar
[{'answer': 'Miljenko Matijevic', 'provenance': [{'wikipedia_id': '1530223', 'title': 'Rock Star (2001 film)', 'start_paragraph_id': 5, 'start_character': 562, 'end_paragraph_id': 5, 'end_character': 580, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '1530223', 'title': 'Rock Star (2001 film)', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 1014, 'bleu_score': 0.8948553147082141, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12519959769530531241}, 'section': 'Section::::Plot.\n'}]}]