Ошибка при передачи типа Document в output_parser.parse?

Question

[Алексей Яковлев]

qa_chain = RetrievalQA.from_chain_type( 
    llm=ChatOpenAI(model_name="gpt-3.5-turbo", temperature=0.7), 
    chain_type="stuff", 
    retriever=retriever, 
    chain_type_kwargs=chain_type_kwargs,  # prompt
    return_source_documents=True, 
)

llm_response = qa_chain(input_data) 
response_text = json.dumps(llm_response) 
parser_output = output_parser.parse(response_text)

Получаю ошибку:

TypeError: Object of type Document is not JSON serializable