我正在尝试使用此查询删除一些三元组：
deleteQuery = """DELETE { ?a ?b ?c } WHERE { mynamespace:List mynamespace:Item ?c.
?a ?b ?c }"""
我的命名空间已经定义，所以这不是问题。我不确定我是否使用了正确的查询语法。当我发出查询时，我收到此错误：
400 EOF while parsing.
Expected terminals:
(prefix describe sum correlation select average modify insert median
load ask construct clear count stats delete).
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "triple_store_methods_v2.py", line 40, in query
myResults = myTupleQuery.evaluate()
File "/usr/local/agraph-fse-3.3/python/franz/openrdf/query/query.py", line 358, in evaluate
response = self.evaluate_generic_query()
File "/usr/local/agraph-fse-3.3/python/franz/openrdf/query/query.py", line 239, in evaluate_generic_query
checkVariables=self.checkVariables, accept=accept)
File "/usr/local/agraph-fse-3.3/python/franz/miniclient/repository.py", line 80, in evalSparqlQuery
accept=accept)
File "/usr/local/agraph-fse-3.3/python/franz/miniclient/request.py", line 114, in jsonRequest
else: raise RequestError(status, body)
franz.miniclient.request.RequestError: Server returned 400: EOF while parsing.
Expected terminals:
(prefix describe sum correlation select average modify insert median
load ask construct clear count stats delete).
我不明白我做错了什么。顺便说一句，我正在使用 AllegroGraph 3.3。