diff --git a/book/chapters/data2.ipynb b/book/chapters/data2.ipynb
index a7aa517..d22f927 100755
--- a/book/chapters/data2.ipynb
+++ b/book/chapters/data2.ipynb
@@ -17,7 +17,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": 2,
    "id": "fc03490e-6875-4e62-af5c-e5978d95dc4e",
    "metadata": {
     "tags": []
@@ -132,7 +132,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": 3,
    "id": "e2f40d77-b640-4f7b-9d7b-48ea8c977ad1",
    "metadata": {
     "tags": []