Question: who played the leader of the saxons in king arthur
[{'answer': 'Stellan Skarsgård', 'provenance': [{'wikipedia_id': '709510', 'title': 'King Arthur (2004 film)', 'start_paragraph_id': 6, 'start_character': 358, 'end_paragraph_id': 6, 'end_character': 375, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '709510', 'title': 'King Arthur (2004 film)', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 649, 'bleu_score': 0.9815648442794911, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13562233253102884863}, 'section': 'Section::::Plot.\n'}]}]