Question: who plays alex rider in the movie stormbreaker
[{'answer': 'Alex Pettyfer', 'provenance': [{'wikipedia_id': '4515396', 'title': 'Stormbreaker (film)', 'start_paragraph_id': 1, 'start_character': 257, 'end_paragraph_id': 1, 'end_character': 270, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4515396', 'title': 'Stormbreaker (film)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 547, 'bleu_score': 0.8151171447559711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14753128121747084605}, 'section': 'Section::::Abstract.'}]}]