Question: when did the simpsons get a new intro
[{'answer': 'season 20', 'provenance': [{'wikipedia_id': '5451605', 'title': 'The Simpsons opening sequence', 'start_paragraph_id': 2, 'start_character': 420, 'end_paragraph_id': 2, 'end_character': 429, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5451605', 'title': 'The Simpsons opening sequence', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 562, 'bleu_score': 0.9788329837059241, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14057818401059768019}, 'section': 'Section::::Abstract.'}]}]