Question: how many episodes in season 12 nypd blue
[{'answer': '20', 'provenance': [{'wikipedia_id': '7076921', 'title': 'NYPD Blue (season 12)', 'start_paragraph_id': 1, 'start_character': 78, 'end_paragraph_id': 1, 'end_character': 80, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]