Question: how many characters are in dragon ball z fighterz
[{'answer': '24', 'provenance': [{'wikipedia_id': '54264840', 'title': 'Dragon Ball FighterZ', 'start_paragraph_id': 4, 'start_character': 197, 'end_paragraph_id': 4, 'end_character': 199, 'bleu_score': 1.0, 'section': 'Section::::Gameplay.\n'}]}]