Question: who sings jingle bell rock in lethal weapon
[{'answer': 'Bobby Helms', 'provenance': [{'wikipedia_id': '7494462', 'title': 'Lethal Weapon (soundtrack)', 'start_paragraph_id': 35, 'start_character': 32, 'end_paragraph_id': 35, 'end_character': 43, 'bleu_score': 1.0, 'section': 'Section::::2013 Limited Edition.\n'}]}]