Question: who played tarkin in the original star wars
[{'answer': 'Cushing', 'provenance': [{'wikipedia_id': '159618', 'title': 'Peter Cushing', 'start_paragraph_id': 0, 'start_character': 6, 'end_paragraph_id': 0, 'end_character': 13, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]