Update README

README.md

@@ -37,7 +37,14 @@ Note that schemas are parsed as [JSON5](https://json5.org/) to be more permissiv
 
     pipenv run python validate_schemas.py
 
-# Step 5: Split into train, test, and validation
+# Step 5: Retrieve additional metadata
+
+We also collect language information using [Fasttext](https://fasttext.cc/docs/en/language-identification.html) and fetch the associated license from the GitHub API.
+
+    pipenv run python get_languages.py > languages.json
+    pipenv run python get_licenses.py > licenses.json
+
+# Step 6: Split into train, test, and validation
 
 Finally data is split into training, test, and validation sets.
 Schemas are always grouped together in the same set based on the GitHub organization they are from.