Question: how many seasons of sgt frog are there
[{'answer': '7', 'provenance': [{'wikipedia_id': '11100042', 'title': 'List of Sgt. Frog episodes', 'start_paragraph_id': 3, 'start_character': 249, 'end_paragraph_id': 3, 'end_character': 250, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]