Question: who played john smith in i am number four
[{'answer': 'Alex Pettyfer', 'provenance': [{'wikipedia_id': '32581589', 'title': 'List of Lorien Legacies characters', 'start_paragraph_id': 54, 'start_character': 52, 'end_paragraph_id': 54, 'end_character': 65, 'bleu_score': 1.0, 'section': 'Section::::The Garde.:Number Four.\n'}]}, {'provenance': [{'wikipedia_id': '32581589', 'title': 'List of Lorien Legacies characters', 'start_paragraph_id': 54, 'start_character': 0, 'end_paragraph_id': 54, 'end_character': 65, 'bleu_score': 0.8242367502646051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5256863006195454494}, 'section': 'Section::::The Garde.:Number Four.\n'}]}]