Question: who did the voice of aslan in narnia
[{'answer': 'Liam Neeson', 'provenance': [{'wikipedia_id': '21478972', 'title': 'Aslan', 'start_paragraph_id': 26, 'start_character': 49, 'end_paragraph_id': 26, 'end_character': 60, 'bleu_score': 1.0, 'section': 'Section::::Film portrayals.\n'}]}]