but it is showing error
---------------------------------------------------------------------------
IndexError Traceback (most recent call last)
<ipython-input-35-3639e5dd6690> in <cell line: 1>()
----> 1 retrieved_nodes = retriever.retrieve("DĂ© un resumen de los tratamientos para la fibrosis quĂstica")
2 print(len(retrieved_nodes))
3 frames
/usr/local/lib/python3.10/dist-packages/llama_index/core/instrumentation/dispatcher.py in wrapper(func, instance, args, kwargs)
272 )
273 try:
--> 274 result = func(*args, **kwargs)
275 except BaseException as e:
276 self.event(SpanDropEvent(span_id=id_, err_str=str(e)))
/usr/local/lib/python3.10/dist-packages/llama_index/core/base/base_retriever.py in retrieve(self, str_or_query_bundle)
242 payload={EventPayload.QUERY_STR: query_bundle.query_str},
243 ) as retrieve_event:
--> 244 nodes = self._retrieve(query_bundle)
245 nodes = self._handle_recursive_retrieval(query_bundle, nodes)
246 retrieve_event.on_end(
/usr/local/lib/python3.10/dist-packages/llama_index/core/indices/document_summary/retrievers.py in _retrieve(self, query_bundle)
96 query_str=query_str,
97 )
---> 98 raw_choices, relevances = self._parse_choice_select_answer_fn(
99 raw_response, len(summary_nodes)
100 )
/usr/local/lib/python3.10/dist-packages/llama_index/core/indices/utils.py in default_parse_choice_select_answer_fn(answer, num_choices, raise_error)
102 "answer_num: <int>, answer_relevance: <float>"
103 )
--> 104 answer_num = int(line_tokens[0].split(":")[1].strip())
105 if answer_num > num_choices:
106 continue
IndexError: list index out of range