Question: how many volumes of darkwing duck are there
[{'answer': 'six volumes', 'provenance': [{'wikipedia_id': '93996', 'title': 'Darkwing Duck', 'start_paragraph_id': 44, 'start_character': 165, 'end_paragraph_id': 44, 'end_character': 176, 'bleu_score': 1.0, 'section': 'Section::::Home media.:Video on Demand.:International.\n'}]}, {'provenance': [{'wikipedia_id': '93996', 'title': 'Darkwing Duck', 'start_paragraph_id': 44, 'start_character': 0, 'end_paragraph_id': 44, 'end_character': 257, 'bleu_score': 0.9529077664391161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 355452441360204936}, 'section': 'Section::::Home media.:Video on Demand.:International.\n'}]}]