chatbot-example does not get the right result as shown in the notebook.

[liu-xiao-guo]

https://github.com/elastic/elasticsearch-labs/blob/main/notebooks/langchain/self-query-retriever-examples/chatbot-example.ipynb

I followed the exact steps as described in the notebook. In the last step, I used the same question, but I got the result "I do not know".

However, if I changed the question to "What movies are about dreams and it was released after the year 2009 but before 2011?". Then I will get the exact same result as in the notebook.