Question: who played luke father in return of the jedi
[{'answer': 'David Prowse', 'provenance': [{'wikipedia_id': '50744', 'title': 'Return of the Jedi', 'start_paragraph_id': 1, 'start_character': 468, 'end_paragraph_id': 1, 'end_character': 480, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]