Question: when did lori change on that 70s show
[{'answer': 'the sixth season', 'provenance': [{'wikipedia_id': '733874', 'title': 'Lisa Robin Kelly', 'start_paragraph_id': 6, 'start_character': 319, 'end_paragraph_id': 6, 'end_character': 335, 'bleu_score': 1.0, 'section': 'Section::::Career.\n'}]}, {'provenance': [{'wikipedia_id': '733874', 'title': 'Lisa Robin Kelly', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 501, 'bleu_score': 0.978138775770484, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2116723728369249791}, 'section': 'Section::::Career.\n'}]}]