Question: who sang for snow white in the disney movie
[{'answer': 'Adriana Caselotti', 'provenance': [{'wikipedia_id': '1852196', 'title': 'Adriana Caselotti', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]