diff --git a/Notebooks/Chap13/13_2_Graph_Classification.ipynb b/Notebooks/Chap13/13_2_Graph_Classification.ipynb
index c50b8bd..e0c15b0 100644
--- a/Notebooks/Chap13/13_2_Graph_Classification.ipynb
+++ b/Notebooks/Chap13/13_2_Graph_Classification.ipynb
@@ -4,7 +4,7 @@
   "metadata": {
     "colab": {
       "provenance": [],
-      "authorship_tag": "ABX9TyNXtvnYIArM5r9NA5Qpwuvm",
+      "authorship_tag": "ABX9TyOMSGUFWT+YN0fwYHpMmHJM",
       "include_colab_link": true
     },
     "kernelspec": {
@@ -232,9 +232,9 @@
     {
       "cell_type": "markdown",
       "source": [
-        "TODO -- encode the adjaceny matrix and node matrix for propanol and run the network again.  Show that the network still runs even though the size of the input graph is different.\n",
+        "TODO -- encode the adjacency matrix and node matrix for propanol and run the network again.  Show that the network still runs even though the size of the input graph is different.\n",
         "\n",
-        "Propanol structure can be found [here](https://https://en.wikipedia.org/wiki/File:Propanol_flat_structure.png)."
+        "Propanol structure can be found [here](https://upload.wikimedia.org/wikipedia/commons/b/b8/Propanol_flat_structure.png)."
       ],
       "metadata": {
         "id": "l44vHi50zGqY"