Question: who plays voldemort in harry potter and the philosopher's stone
[{'answer': 'Ian Hart', 'provenance': [{'wikipedia_id': '45106', 'title': 'Lord Voldemort', 'start_paragraph_id': 31, 'start_character': 168, 'end_paragraph_id': 31, 'end_character': 176, 'bleu_score': 1.0, 'section': 'Section::::Portrayals within films.\n'}]}, {'answer': 'Richard Bremmer', 'provenance': [{'wikipedia_id': '45106', 'title': 'Lord Voldemort', 'start_paragraph_id': 31, 'start_character': 703, 'end_paragraph_id': 31, 'end_character': 718, 'bleu_score': 1.0, 'section': 'Section::::Portrayals within films.\n'}]}, {'provenance': [{'wikipedia_id': '45106', 'title': 'Lord Voldemort', 'start_paragraph_id': 31, 'start_character': 0, 'end_paragraph_id': 31, 'end_character': 894, 'bleu_score': 0.966492079852397, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17006869653559912509}, 'section': 'Section::::Portrayals within films.\n'}]}, {'provenance': [{'wikipedia_id': '45106', 'title': 'Lord Voldemort', 'section': 'Section::::Portrayals within films.\n', 'start_paragraph_id': 31, 'end_paragraph_id': 31, 'meta': {'evidence_span': ['In "Harry Potter and the Philosopher\'s Stone", Voldemort\'s manifestation is as a face on the back of Quirrell\'s head, an effect achieved by computer generated imagery. Ian Hart, the actor who played Quirrell in the same film, provided the voice and the facial source for this character. Voldemort also appears in a scene in the Forbidden Forest where he is seen drinking the blood of a unicorn. As Voldemort\'s face was altered enough by CG work, and Hart\'s voice was affected enough, there was no confusion by Hart\'s playing of the two roles. In that film, he was also shown in a flashback sequence when he arrived at the home of James and Lily Potter to kill them. In this scene Voldemort is played by Richard Bremmer, though his face is never seen.', "As Voldemort's face was altered enough by CG work, and Hart's voice was affected enough, there was no confusion by Hart's playing of the two roles. In that film, he was also shown in a flashback sequence when he arrived at the home of James and Lily Potter to kill them. In this scene Voldemort is played by Richard Bremmer, though his face is never seen.", 'Richard Bremme']}}]}]