Question: who played general chang in star trek 6
[{'answer': 'Christopher Plummer', 'provenance': [{'wikipedia_id': '1166439', 'title': 'Chang (Star Trek)', 'start_paragraph_id': 1, 'start_character': 100, 'end_paragraph_id': 1, 'end_character': 119, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1166439', 'title': 'Chang (Star Trek)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 122, 'bleu_score': 0.6855303107442261, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9730943129648440091}, 'section': 'Section::::Abstract.'}]}]