Question: when did dark shadows start airing in color
[{'answer': 'August 11 , 1967', 'provenance': [{'wikipedia_id': '165046', 'title': 'Dark Shadows', 'start_paragraph_id': 14, 'start_character': 563, 'end_paragraph_id': 14, 'end_character': 579, 'bleu_score': 1.0, 'section': 'Section::::History.:Broadcast history.\n'}]}, {'provenance': [{'wikipedia_id': '165046', 'title': 'Dark Shadows', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 789, 'bleu_score': 0.8158750215757521, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17955709160119735469}, 'section': 'Section::::History.:Broadcast history.\n'}]}]