Question: how many chinese letters are in the alphabet
[{'answer': 'tens of thousands', 'provenance': [{'wikipedia_id': '91231', 'title': 'Chinese characters', 'start_paragraph_id': 3, 'start_character': 33, 'end_paragraph_id': 3, 'end_character': 50, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '91231', 'title': 'Chinese characters', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 895, 'bleu_score': 0.9488086781061921, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8555761919273144807}, 'section': 'Section::::Abstract.'}]}]