Question: who plays sam witwicky in the movie transformers
[{'answer': 'Shia Saide LaBeouf', 'provenance': [{'wikipedia_id': '1353497', 'title': 'Shia LaBeouf', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1353497', 'title': 'Shia LaBeouf', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 544, 'bleu_score': 0.9228526011015631, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14253702887504876208}, 'section': 'Section::::Abstract.'}]}]