Question: who plays spitelout in how to train your dragon
[{'answer': 'David Tennant', 'provenance': [{'wikipedia_id': '18394730', 'title': 'How to Train Your Dragon (film)', 'start_paragraph_id': 18, 'start_character': 12, 'end_paragraph_id': 18, 'end_character': 25, 'bleu_score': 1.0, 'section': 'Section::::Cast.\n'}]}]