### Description
Implements synthetic data generation with the fields and preferences
given by the user. Adds showcase notebook.
Corresponding prompt was proposed for langchain-hub.
### Example
```
output = chain({"fields": {"colors": ["blue", "yellow"]}, "preferences": {"style": "Make it in a style of a weather forecast."}})
print(output)
# {'fields': {'colors': ['blue', 'yellow']},
'preferences': {'style': 'Make it in a style of a weather forecast.'},
'text': "Good morning! Today's weather forecast brings a beautiful combination of colors to the sky, with hues of blue and yellow gently blending together like a mesmerizing painting."}
```
### Twitter handle
@deepsense_ai @matt_wosinski
---------
Co-authored-by: Bagatur <baskaryan@gmail.com>
- Description: Fixing Colab broken link and comment correction to align
with the code that uses Warren Buffet for wiki query
- Issue: None open
- Dependencies: none
- Tag maintainer: n/a
- Twitter handle: Not a PR change but: kcocco
The Graph Chains are different in the way that it uses two LLMChains
instead of one like the retrievalQA chains. Therefore, sometimes you
want to use different LLM to generate the database query and to generate
the final answer.
This feature would make it more convenient to use different LLMs in the
same chain.
I have also renamed the Graph DB QA Chain to Neo4j DB QA Chain in the
documentation only as it is used only for Neo4j. The naming was
ambigious as it was the first graphQA chain added and wasn't sure how do
you want to spin it.
- Description: added graph_memgraph_qa.ipynb which shows how to use LLMs
to provide a natural language interface to a Memgraph database using
[MemgraphGraph](https://github.com/langchain-ai/langchain/pull/8591)
class.
- Dependencies: given that the notebook utilizes the MemgraphGraph
class, it relies on both this class and several Python packages that are
installed in the notebook using pip (langchain, openai, neo4j,
gqlalchemy). The notebook is dependent on having a functional Memgraph
instance running, as it requires this instance to establish a
connection.
