Question: who is the actor in chitty chitty bang bang
[{'answer': 'Dick Van Dyke', 'provenance': [{'wikipedia_id': '3917873', 'title': 'Chitty Chitty Bang Bang', 'start_paragraph_id': 1, 'start_character': 245, 'end_paragraph_id': 1, 'end_character': 258, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]