Question: when was the wizard of oz first shown in color
[{'answer': '1956', 'provenance': [{'wikipedia_id': '8589718', 'title': 'The Wizard of Oz on television', 'start_paragraph_id': 1, 'start_character': 205, 'end_paragraph_id': 1, 'end_character': 209, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '8589718', 'title': 'The Wizard of Oz on television', 'start_paragraph_id': 28, 'start_character': 0, 'end_paragraph_id': 28, 'end_character': 999, 'bleu_score': 0.988731944750971, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9443632800726239797}, 'section': 'Section::::Telecasts in the Pre-Cable Era.:Shown in color.\n'}]}]