Question: who is the girl in theory of a deadman so happy video
[{'answer': 'Serinda Swan', 'provenance': [{'wikipedia_id': '15439966', 'title': 'So Happy (song)', 'start_paragraph_id': 5, 'start_character': 82, 'end_paragraph_id': 5, 'end_character': 94, 'bleu_score': 1.0, 'section': 'Section::::Music video.\n'}]}]