Add data description with ER diagram to readme

README.md

@@ -1,3 +1,12 @@
 # Unsupervised discovery of behaviorally relevant brain states in rats playing hide-and-seek
 
-Code for reading and analyzing the data can be found on [Github](https://github.com/bagibence/hidenseek_hmm)
+This repository contains the SQLite files used for the analysis in Bagi et al. (2022):
+
+- `database.db` contains the data from the hide-and-seek experiments performed by Reinhold et al. (2019) 
+- `observing.db` contains the data from the observing experiments performed by Concha-Miranda et al. (2020).
+
+Both database files have the following structure:
+
+![`hide_and_seek_ER.png`](./hide_and_seek_ER.png)
+
+Code for reading and analyzing the data can be found on [GitHub](https://github.com/bagibence/hidenseek_hmm)