Clarified use of Basics notebook.

docs/Background-Jupyter.md

 
 [Jupyter](https://jupyter.org) is a fantastic tool for writing code with 
 embedded visualizations. We provide one such notebook, `python/Basics.ipynb`, for 
-testing the Pyton control interface to a Unity build in the 
-[Getting Started with the 3D Balance Ball Environment](Getting-Started-with-Balance-Ball.md).
+testing the Python control interface to a Unity build. This notebook is introduced in the 
+[Getting Started with the 3D Balance Ball Environment](Getting-Started-with-Balance-Ball.md),
+but can be used for testing any environment build.
 
 For a walkthrough of how to use Jupyter, see
 [Running the Jupyter Notebook](http://jupyter-notebook-beginner-guide.readthedocs.io/en/latest/execute.html)