Update readme with a data visualisation section (#3)

- Update readme with a data visualisation section (5ceebee843ddbbdb4154a7cbad0221c3cf6797eb)


Co-authored-by: Louis-Marie Lorin <[email protected]>

README.md

@@ -386,6 +386,15 @@ Full conversation trees can be reconstructed from the flat messages table by usi
 and `message_id` properties to identify the parent-child relationship of messages. The `message_tree_id` 
 and `tree_state` properties (only present in flat messages files) can be used to find all messages of a message tree or to select trees by their state.
 
+### Data Visualisation
+
+Explore the content of the prompts from the English subset using [Bunka](https://github.com/charlesdedampierre/BunkaTopics) open-source visualization technology. 
+The interactive map [available on a HF space](https://huggingface.co/spaces/bunkalab/visualisation-oasst2) allows to explore each datapoint to get a more precise overview of the contents.
+
+<a href="https://i.imgur.com/B2H8LR3.png">
+  <img src="https://i.imgur.com/B2H8LR3.png" alt="Bunka oasst2 Map" width="35%"/>
+</a>
+
 ## Contact
 
 - Discord [Open Assistant Discord Server](https://ykilcher.com/open-assistant-discord)