Question: how many seasons of johnny bravo are there
[{'answer': 'four', 'provenance': [{'wikipedia_id': '738015', 'title': 'Johnny Bravo', 'start_paragraph_id': 2, 'start_character': 415, 'end_paragraph_id': 2, 'end_character': 419, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '738015', 'title': 'Johnny Bravo', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 655, 'bleu_score': 0.6589437636513671, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6501677073777068188}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '738015', 'title': 'Johnny Bravo', 'section': 'Section::::Abstract.', 'start_paragraph_id': 2, 'end_paragraph_id': 2, 'meta': {'evidence_span': ["artible returned for the series' fourth season, restoring it to its original format and style. A total of four seasons and 67 episodes have aired. The first three seasons were produced by Hanna-Barbera Cartoons, and the fourth season was produced by Cartoon Network Studios.", 'four']}}]}]