Question: when did wheel of fortune go on the air
[{'answer': 'January 6 , 1975', 'provenance': [{'wikipedia_id': '25749059', 'title': 'Wheel of Fortune (American game show)', 'start_paragraph_id': 57, 'start_character': 32, 'end_paragraph_id': 57, 'end_character': 48, 'bleu_score': 1.0, 'section': 'Section::::Broadcast history.\n'}]}]