Question: when did thomas the tank engine became cgi
[{'answer': 'in 2009', 'provenance': [{'wikipedia_id': '231475', 'title': 'Thomas & Friends', 'start_paragraph_id': 32, 'start_character': 53, 'end_paragraph_id': 32, 'end_character': 60, 'bleu_score': 1.0, 'section': 'Section::::History.:"Thomas and Friends".\n'}]}, {'provenance': [{'wikipedia_id': '231475', 'title': 'Thomas & Friends', 'start_paragraph_id': 41, 'start_character': 0, 'end_paragraph_id': 41, 'end_character': 316, 'bleu_score': 0.9663744727315161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15213871515580947841}, 'section': 'Section::::Cast.\n'}]}]