Question: who played oliver twist in the 1968 film
[{'answer': 'Mark Lester', 'provenance': [{'wikipedia_id': '1792885', 'title': 'Mark Lester', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 11, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]