# LabeledCriteriaEvalChain

> **Class** in `langchain_classic`

📖 [View in docs](https://reference.langchain.com/python/langchain-classic/evaluation/criteria/eval_chain/LabeledCriteriaEvalChain)

Criteria evaluation chain that requires references.

## Signature

```python
LabeledCriteriaEvalChain()
```

## Extends

- `CriteriaEvalChain`

## Properties

- `requires_reference`

## Methods

- [`is_lc_serializable()`](https://reference.langchain.com/python/langchain-classic/evaluation/criteria/eval_chain/LabeledCriteriaEvalChain/is_lc_serializable)
- [`from_llm()`](https://reference.langchain.com/python/langchain-classic/evaluation/criteria/eval_chain/LabeledCriteriaEvalChain/from_llm)

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[View source on GitHub](https://github.com/langchain-ai/langchain/blob/c59e83a1ffba63d709ea4847445845edd82085dc/libs/langchain/langchain_classic/evaluation/criteria/eval_chain.py#L508)