The CotQAEvalChain's default prompt instructs the model to do this.eval_chain = load_evaluator("cot_qa", eval_llm=llm)eval_chain.evaluate_strings(    input="Who won the NFC championship game in 2023?",    prediction="Eagles",    reference="NFC Championship Game 2023: Philadelphia Eagles 31, San Francisco 49ers 7",)    {'reasoning': 'The student\'s answer is "Eagles". The context states that the Philadelphia Eagles won the NFC championship game in 2023. Therefore, the student\'s answer matches the information provided in the context.',     'value': 'GRADE: CORRECT',     'score': 1}PreviousEmbedding DistanceNextString DistanceSQL CorrectnessUsing ContextCoT With ContextCommunityDiscordTwitterGitHubPythonJS/TSMoreHomepageBlogCopyright Â© 2023 LangChain, Inc.