Question: when was the wizard of oz made in technicolor
[{'answer': '1939', 'provenance': [{'wikipedia_id': '561315', 'title': 'The Wizard of Oz (1939 film)', 'start_paragraph_id': 0, 'start_character': 18, 'end_paragraph_id': 0, 'end_character': 22, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '561315', 'title': 'The Wizard of Oz (1939 film)', 'start_paragraph_id': 2, 'start_character': 92, 'end_paragraph_id': 2, 'end_character': 726, 'bleu_score': 0.744440227697387, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15029212403679127559}, 'section': 'Section::::Abstract.'}]}]