Question: who played the grand nagus in deep space nine
[{'answer': 'Wallace Michael Shawn', 'provenance': [{'wikipedia_id': '33905', 'title': 'Wallace Shawn', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '33905', 'title': 'Wallace Shawn', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 638, 'bleu_score': 0.6507252808004671, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2752894194155503382}, 'section': 'Section::::Abstract.'}]}]