Question: who played the karate kid in the first movie
[{'answer': 'Ralph George Macchio , Jr.'}, {'provenance': [{'wikipedia_id': '577433', 'title': 'Ralph Macchio', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 327, 'bleu_score': 0.7926598900906201, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13511772797196584199}, 'section': 'Section::::Abstract.'}]}]