Refine chall 3-3

Author: sylwia-budzynska

3/3/instructions.md

@@ -1,3 +1,9 @@
-Flask is a popular Python web framework. Frameworks very often introduce potential sources for untrusted data, [Flask request](https://flask.palletsprojects.com/en/3.0.x/api/#incoming-request-data) being one of them. Write a query to find Flask requests.
+Flask is a popular Python web framework. Frameworks very often introduce potential sources for untrusted data, [Flask request](https://flask.palletsprojects.com/en/3.0.x/api/#incoming-request-data) being one of them. For example, a source of untrusted data could be:
+
+```
+username = request.args.get("username")
+```
+
+Write a query to find `request.args`
 
 See solution in this folder.