Can't handle PREFIXes in SPARQL queries

[kevinstadler]

e823e28 breaks support for PREFIXes in queries:

PREFIX crm: <http://www.cidoc-crm.org/cidoc-crm/>
PREFIX lrmoo: <http://iflastandards.info/ns/lrm/lrmoo/>
PREFIX star: <https://r11.eu/ns/star/>
PREFIX skos: <http://www.w3.org/2004/02/skos/core#>
PREFIX r11: <https://r11.eu/ns/spec/>
PREFIX r11pros: <https://r11.eu/ns/prosopography/>

SELECT
?written_work
  ?written_work__written_work_label
  ?written_work__work_creation_assertion
    ?written_work__work_creation_assertion__work_creation
      ?written_work__work_creation_assertion__work_creation__work_creation_6464e7f7408f5
      ?written_work__work_creation_assertion__work_creation__text_creation_timeframe_assertio
    ?written_work__work_creation_assertion__work_creation_assertion_by
    ?written_work__work_creation_assertion__work_creation_assertion_by_64676da87229e

WHERE {
?written_work a r11:Text_Expression.

  ?written_work crm:P3_has_note ?written_work__written_work_label.

  OPTIONAL {
  ?written_work__work_creation_assertion a star:E13_lrmoo_R17.
  ?written_work__work_creation_assertion crm:P141_assigned ?written_work.

    ?written_work__work_creation_assertion__work_creation a lrmoo:F28_Expression_Creation.
    ?written_work__work_creation_assertion___wc crm:P141_assigned ?written_work__work_creation_assertion.
    ?written_work__work_creation_assertion___wc crm:P140_assigned_attribute_to ?written_work__work_creation_assertion__work_creation.

      OPTIONAL {
      ?written_work__work_creation_assertion__work_creation__work_creation_6464e7f7408f5 a star:E13_crm_P14.
      ?written_work__work_creation_assertion__work_creation___wc6 crm:P141_assigned ?written_work__work_creation_assertion__work_creation.
      ?written_work__work_creation_assertion__work_creation___wc6 crm:P140_assigned_attribute_to ?written_work__work_creation_assertion__work_creation___wc6___wc6.
      ?written_work__work_creation_assertion__work_creation__work_creation_6464e7f7408f5 crm:P140_assigned_attribute_to ?written_work__work_creation_assertion__work_creation___wc6___wc6.
      }

      ?written_work__work_creation_assertion__work_creation__text_creation_timeframe_assertio a star:E13_crm_P4.
      ?written_work__work_creation_assertion__work_creation___tcta crm:P141_assigned ?written_work__work_creation_assertion__work_creation.
      ?written_work__work_creation_assertion__work_creation___tcta crm:P140_assigned_attribute_to ?written_work__work_creation_assertion__work_creation___tcta___tcta.
      ?written_work__work_creation_assertion__work_creation__text_creation_timeframe_assertio crm:P140_assigned_attribute_to ?written_work__work_creation_assertion__work_creation___tcta___tcta.

    ?written_work__work_creation_assertion__work_creation_assertion_by a crm:E21_Person.
    ?written_work__work_creation_assertion___wcab crm:P141_assigned ?written_work__work_creation_assertion.
    ?written_work__work_creation_assertion___wcab crm:P14_carried_out_by ?written_work__work_creation_assertion__work_creation_assertion_by.

    ?written_work__work_creation_assertion__work_creation_assertion_by_64676da87229e a r11:Author_Group.
    ?written_work__work_creation_assertion___wcab6 crm:P141_assigned ?written_work__work_creation_assertion.
    ?written_work__work_creation_assertion___wcab6 crm:P14_carried_out_by ?written_work__work_creation_assertion__work_creation_assertion_by_64676da87229e.
  }
}

b'MALFORMED QUERY: Encountered " "prefix" "PREFIX "" at line 15, column 3.\nWas expecting one of:\n "(" ...\n "{" ...\n "}" ...\n "[" ...\n ...\n ...\n "select" ...\n "optional" ...\n "graph" ...\n "minus" ...\n "filter" ...\n "true" ...\n "false" ...\n "bind" ...\n "service" ...\n "values" ...\n <Q_IRI_REF> ...\n <PNAME_NS> ...\n <PNAME_LN> ...\n <BLANK_NODE_LABEL> ...\n ...\n ...\n ...\n <INTEGER_POSITIVE> ...\n <INTEGER_NEGATIVE> ...\n ...\n <DECIMAL_POSITIVE> ...\n <DECIMAL_NEGATIVE> ...\n ...\n <DOUBLE_POSITIVE> ...\n <DOUBLE_NEGATIVE> ...\n <STRING_LITERAL1> ...\n <STRING_LITERAL2> ...\n <STRING_LITERAL_LONG1> ...\n <STRING_LITERAL_LONG2> ...\n "<<" ...\n '

full stack trace:

Traceback (most recent call last):
  File "/home/kstadler/.local/lib/python3.10/site-packages/uvicorn/protocols/http/httptools_impl.py", line 401, in run_asgi
    result = await app(  # type: ignore[func-returns-value]
  File "/home/kstadler/.local/lib/python3.10/site-packages/uvicorn/middleware/proxy_headers.py", line 70, in __call__
    return await self.app(scope, receive, send)
  File "/home/kstadler/.local/lib/python3.10/site-packages/fastapi/applications.py", line 1054, in __call__
    await super().__call__(scope, receive, send)
  File "/home/kstadler/.local/lib/python3.10/site-packages/starlette/applications.py", line 113, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/home/kstadler/.local/lib/python3.10/site-packages/starlette/middleware/errors.py", line 187, in __call__
    raise exc
  File "/home/kstadler/.local/lib/python3.10/site-packages/starlette/middleware/errors.py", line 165, in __call__
    await self.app(scope, receive, _send)
  File "/home/kstadler/.local/lib/python3.10/site-packages/starlette/middleware/cors.py", line 85, in __call__
    await self.app(scope, receive, send)
  File "/home/kstadler/.local/lib/python3.10/site-packages/starlette/middleware/exceptions.py", line 62, in __call__
    await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
  File "/home/kstadler/.local/lib/python3.10/site-packages/starlette/_exception_handler.py", line 62, in wrapped_app
    raise exc
  File "/home/kstadler/.local/lib/python3.10/site-packages/starlette/_exception_handler.py", line 51, in wrapped_app
    await app(scope, receive, sender)
  File "/home/kstadler/.local/lib/python3.10/site-packages/starlette/routing.py", line 715, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/home/kstadler/.local/lib/python3.10/site-packages/starlette/routing.py", line 735, in app
    await route.handle(scope, receive, send)
  File "/home/kstadler/.local/lib/python3.10/site-packages/starlette/routing.py", line 288, in handle
    await self.app(scope, receive, send)
  File "/home/kstadler/.local/lib/python3.10/site-packages/starlette/routing.py", line 76, in app
    await wrap_app_handling_exceptions(app, request)(scope, receive, send)
  File "/home/kstadler/.local/lib/python3.10/site-packages/starlette/_exception_handler.py", line 62, in wrapped_app
    raise exc
  File "/home/kstadler/.local/lib/python3.10/site-packages/starlette/_exception_handler.py", line 51, in wrapped_app
    await app(scope, receive, sender)
  File "/home/kstadler/.local/lib/python3.10/site-packages/starlette/routing.py", line 73, in app
    response = await f(request)
  File "/home/kstadler/.local/lib/python3.10/site-packages/fastapi/routing.py", line 301, in app
    raw_response = await run_endpoint_function(
  File "/home/kstadler/.local/lib/python3.10/site-packages/fastapi/routing.py", line 214, in run_endpoint_function
    return await run_in_threadpool(dependant.call, **values)
  File "/home/kstadler/.local/lib/python3.10/site-packages/starlette/concurrency.py", line 39, in run_in_threadpool
    return await anyio.to_thread.run_sync(func, *args)
  File "/home/kstadler/.local/lib/python3.10/site-packages/anyio/to_thread.py", line 56, in run_sync
    return await get_async_backend().run_sync_in_worker_thread(
  File "/home/kstadler/.local/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 2177, in run_sync_in_worker_thread
    return await future
  File "/home/kstadler/.local/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 859, in run
    result = context.run(func, *args)
  File "/home/kstadler/releven-backend/releven.py", line 51, in written_work
    return adapter.query()
  File "/home/kstadler/releven-backend/rdfproxy/adapter.py", line 60, in query
    items_query_bindings: Iterator[dict] = query_with_wrapper(
  File "/home/kstadler/releven-backend/rdfproxy/utils/sparql_utils.py", line 154, in query_with_wrapper
    result: QueryResult = sparql_wrapper.query()
  File "/home/kstadler/.local/lib/python3.10/site-packages/SPARQLWrapper/Wrapper.py", line 960, in query
    return QueryResult(self._query())
  File "/home/kstadler/.local/lib/python3.10/site-packages/SPARQLWrapper/Wrapper.py", line 930, in _query
    raise QueryBadFormed(e.read())
SPARQLWrapper.SPARQLExceptions.QueryBadFormed: QueryBadFormed: A bad request has been sent to the endpoint: probably the SPARQL query is badly formed.

This non-nested query on the other hand works: fine

PREFIX crm: <http://www.cidoc-crm.org/cidoc-crm/>
PREFIX lrmoo: <http://iflastandards.info/ns/lrm/lrmoo/>
PREFIX star: <https://r11.eu/ns/star/>
PREFIX skos: <http://www.w3.org/2004/02/skos/core#>
PREFIX r11: <https://r11.eu/ns/spec/>
PREFIX r11pros: <https://r11.eu/ns/prosopography/>

SELECT
?location
  ?location__location_descriptive_name

WHERE {
?location a crm:E53_Place.

  ?location crm:P3_has_note ?location__location_descriptive_name.
}