Question: how many episodes are in dance moms season 2
[{'answer': '30', 'provenance': [{'wikipedia_id': '33414142', 'title': 'Dance Moms (season 2)', 'start_paragraph_id': 1, 'start_character': 247, 'end_paragraph_id': 1, 'end_character': 249, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]