Question: how many seasons is there of the simpsons
[{'answer': '29', 'provenance': [{'wikipedia_id': '29838', 'title': 'The Simpsons', 'start_paragraph_id': 17, 'start_character': 532, 'end_paragraph_id': 17, 'end_character': 534, 'bleu_score': 1.0, 'section': 'Section::::Premise.:Setting.\n'}]}]