Question: who sang the song sealed with a kiss
[{'answer': 'The Four Voices', 'provenance': [{'wikipedia_id': '7151326', 'title': 'Sealed with a Kiss', 'start_paragraph_id': 1, 'start_character': 330, 'end_paragraph_id': 1, 'end_character': 345, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]