Question: who won the best actress oscar for the 1987 movie moonstruck
[{'answer': 'Cher', 'provenance': [{'wikipedia_id': '129331', 'title': 'Moonstruck', 'start_paragraph_id': 2, 'start_character': 214, 'end_paragraph_id': 2, 'end_character': 218, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]