input_variables: [existing_answer, text]
output_parser: null
template: "
    Your job is to produce a final summary\n
    We have provided an existing summary up to a certain point: {existing_answer}\n
    We have the opportunity to refine the existing summary
    (only if needed) with some more context below.\n
    ------------\n
    {text}\n
    ------------\n
    Given the new context, refine the original summary
    If the context isn't useful, return the original summary."
template_format: f-string