Question: who is liam neeson in dark knight rises
[{'answer': "Ra 's al Ghul", 'provenance': [{'wikipedia_id': '29075630', 'title': 'The Dark Knight Rises', 'start_paragraph_id': 22, 'start_character': 979, 'end_paragraph_id': 22, 'end_character': 995, 'bleu_score': 1.0, 'section': 'Section::::Cast.\n'}]}, {'provenance': [{'wikipedia_id': '29075630', 'title': 'The Dark Knight Rises', 'start_paragraph_id': 21, 'start_character': 0, 'end_paragraph_id': 21, 'end_character': 1040, 'bleu_score': 0.965869324082089, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3263826879412188356}, 'section': 'Section::::Cast.\n'}]}]