Question: who played the scare crow in wizard of oz
[{'answer': 'Raymond Wallace Bolger', 'provenance': [{'wikipedia_id': '178250', 'title': 'Ray Bolger', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 22, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]