# QAGenerateChain

> **Class** in `langchain_classic`

📖 [View in docs](https://reference.langchain.com/python/langchain-classic/evaluation/qa/generate_chain/QAGenerateChain)

LLM Chain for generating examples for question answering.

## Signature

```python
QAGenerateChain()
```

## Extends

- `LLMChain`

## Properties

- `output_parser`
- `output_key`

## Methods

- [`is_lc_serializable()`](https://reference.langchain.com/python/langchain-classic/evaluation/qa/generate_chain/QAGenerateChain/is_lc_serializable)
- [`from_llm()`](https://reference.langchain.com/python/langchain-classic/evaluation/qa/generate_chain/QAGenerateChain/from_llm)

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[View source on GitHub](https://github.com/langchain-ai/langchain/blob/9f232caa7a8fe1ca042a401942d5d90d54ceb1a6/libs/langchain/langchain_classic/evaluation/qa/generate_chain.py#L22)