Acknowledge provis in the README

README.md

@@ -23,4 +23,8 @@ poetry run streamlit run hexviz/streamlit/Attention_On_Structure.py
 Spaces [require](https://huggingface.co/docs/hub/spaces-dependencies#adding-your-own-dependencies) dependencies in a `requirements.txt` file. Export depencies from poetry's `pyproject.toml` file with:
 ```shell
 poetry export -f requirements.txt --output requirements.txt --without-hashes
-```
+```
+
+## Acknowledgements
+This project builds on the attention visualization introduced and developed in 
+https://github.com/salesforce/provis#provis-attention-visualizer