Question: how many volumes of tokyo ghoul re will there be
[{'answer': '15', 'provenance': [{'wikipedia_id': '41660623', 'title': 'Tokyo Ghoul', 'start_paragraph_id': 1, 'start_character': 272, 'end_paragraph_id': 1, 'end_character': 274, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]