Question: how many episodes in season 6 of star wars the clone wars
[{'answer': '13', 'provenance': [{'wikipedia_id': '19229713', 'title': 'List of Star Wars: The Clone Wars episodes', 'start_paragraph_id': 2, 'start_character': 15, 'end_paragraph_id': 2, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]