问答模块无法正常使用

[scalaKing]

你好，我尝试使用您的问答模块跑demo，就是运行naiveKGQA.py这个Python脚本，结果直接报如下错误：
问：你好
答：你好
问：孙中山干了什么事？
Traceback (most recent call last):
File "D:\workspace\git\HarvestText\examples\naiveKGQA.py", line 165, in
print("答："+QA.answer(question0))
File "D:\workspace\git\HarvestText\examples\naiveKGQA.py", line 110, in answer
answers = self.search_answers(search0)
File "D:\workspace\git\HarvestText\examples\naiveKGQA.py", line 99, in search_answers
records = self.KG.query(search0)
File "D:\ProgramData\anaconda3\envs\kg_env\lib\site-packages\rdflib\graph.py", line 1127, in query
result = plugin.get(result, query.Result)
File "D:\ProgramData\anaconda3\envs\kg_env\lib\site-packages\rdflib\plugin.py", line 107, in get
return p.getClass()
File "D:\ProgramData\anaconda3\envs\kg_env\lib\site-packages\rdflib\plugin.py", line 69, in getClass
module = import(self.module_path, globals(), locals(), [""])
File "D:\ProgramData\anaconda3\envs\kg_env\lib\site-packages\rdflib\plugins\sparql_init_.py", line 33, in
from . import parser
File "D:\ProgramData\anaconda3\envs\kg_env\lib\site-packages\rdflib\plugins\sparql\parser.py", line 184, in
Param('prefix', PN_PREFIX)) + Suppress(':').leaveWhitespace()
File "D:\ProgramData\anaconda3\envs\kg_env\lib\site-packages\rdflib\plugins\sparql\parserutils.py", line 114, in init
self.name = name
AttributeError: can't set attribute

操作系统：Win10 专业版

python版本：3.6.13

HarvestText版本：0.8.1.8