Question: when did tlc stop being the learning channel
[{'answer': '1998', 'provenance': [{'wikipedia_id': '235107', 'title': 'TLC (TV network)', 'start_paragraph_id': 11, 'start_character': 11, 'end_paragraph_id': 11, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::History.:1980–98: The Learning Channel, "A place for learning minds".\n'}]}, {'provenance': [{'wikipedia_id': '235107', 'title': 'TLC (TV network)', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 465, 'bleu_score': 0.9735040436119741, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 206657935094399324}, 'section': 'Section::::History.:1998–2006: "Life Unscripted", new direction.\n'}]}]