Question: when was taarak mehta ka ooltah chashmah started
[{'answer': 'July 28 , 2008'}, {'provenance': [{'wikipedia_id': '23045350', 'title': 'Taarak Mehta Ka Ooltah Chashmah', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 305, 'bleu_score': 0.6654556927438551, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 591813573331737301}, 'section': 'Section::::Abstract.'}]}]