Question: who played yoda in return of the jedi
[{'answer': 'Frank Oz', 'provenance': [{'wikipedia_id': '63171', 'title': 'Yoda', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 8, 'bleu_score': 1.0, 'section': 'Section::::Concept and creation.\n'}]}]