Question: who plays mavis in the movie hotel transylvania
[{'answer': 'Sadie Sandler', 'provenance': [{'wikipedia_id': '31327794', 'title': 'Hotel Transylvania', 'start_paragraph_id': 14, 'start_character': 12, 'end_paragraph_id': 14, 'end_character': 25, 'bleu_score': 1.0, 'section': 'Section::::Voice cast.\n'}]}, {'answer': 'Selena Gomez', 'provenance': [{'wikipedia_id': '31327794', 'title': 'Hotel Transylvania', 'start_paragraph_id': 1, 'start_character': 357, 'end_paragraph_id': 1, 'end_character': 369, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]