Question: who does seth rogen play in kung fu panda 2
[{'answer': 'Master Mantis', 'provenance': [{'wikipedia_id': '23217064', 'title': 'Kung Fu Panda 2', 'start_paragraph_id': 17, 'start_character': 26, 'end_paragraph_id': 17, 'end_character': 39, 'bleu_score': 1.0, 'section': 'Section::::Voice cast.\n'}]}]