Question: who is the actor that plays professor lupin
[{'answer': 'David Thewlis', 'provenance': [{'wikipedia_id': '863760', 'title': 'David Thewlis', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 13, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]