Question: who voices stoic in how to train your dragon
[{'answer': 'Gerard Butler', 'provenance': [{'wikipedia_id': '18394730', 'title': 'How to Train Your Dragon (film)', 'start_paragraph_id': 1, 'start_character': 387, 'end_paragraph_id': 1, 'end_character': 400, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18394730', 'title': 'How to Train Your Dragon (film)', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 87, 'bleu_score': 0.591815015254445, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16311654879544278385}, 'section': 'Section::::Cast.\n'}]}]