Question: who plays charlie in willy wonka and the chocolate factory
[{'answer': 'Peter Gardner Ostrum', 'provenance': [{'wikipedia_id': '685962', 'title': 'Peter Ostrum', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '685962', 'title': 'Peter Ostrum', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 204, 'bleu_score': 0.8675979125638371, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17948203803197657706}, 'section': 'Section::::Abstract.'}]}]