Question: who plays the voice of morgana in trollhunters
[{'answer': 'Lena Headey', 'provenance': [{'wikipedia_id': '39593077', 'title': 'Trollhunters: Tales of Arcadia', 'start_paragraph_id': 36, 'start_character': 12, 'end_paragraph_id': 36, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Cast.:Recurring.\n'}]}, {'provenance': [{'wikipedia_id': '39593077', 'title': 'Trollhunters: Tales of Arcadia', 'start_paragraph_id': 36, 'start_character': 0, 'end_paragraph_id': 36, 'end_character': 122, 'bleu_score': 0.8970773746801091, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9948136601010120613}, 'section': 'Section::::Cast.:Recurring.\n'}]}]