Question: who won the oscar for best picture in 1939
[{'answer': 'Gone with the Wind', 'provenance': [{'wikipedia_id': '4727465', 'title': '12th Academy Awards', 'start_paragraph_id': 2, 'start_character': 32, 'end_paragraph_id': 2, 'end_character': 50, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]