Question: how many episodes are in season 2 of life unexpected
[{'answer': '13', 'provenance': [{'wikipedia_id': '22951088', 'title': 'Life Unexpected', 'start_paragraph_id': 39, 'start_character': 62, 'end_paragraph_id': 39, 'end_character': 64, 'bleu_score': 1.0, 'section': 'Section::::Production.\n'}]}]