Question: who plays ralphie in the movie christmas story
[{'answer': 'Peter Billingsley', 'provenance': [{'wikipedia_id': '932424', 'title': 'A Christmas Story', 'start_paragraph_id': 1, 'start_character': 282, 'end_paragraph_id': 1, 'end_character': 299, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]