diff --git a/05_pet_breeds.ipynb b/05_pet_breeds.ipynb
index 3de002b..6260f31 100644
--- a/05_pet_breeds.ipynb
+++ b/05_pet_breeds.ipynb
@@ -161,7 +161,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "The most powerful and flexible way to extract information from strings like this is to use a *regular expression*, also known as a *regex*. A regular expression is a special string, written in the regular expression language, which specifies a general rule for for deciding if another string passes a test (i.e., \"matches\" the regular expression), and also possibly for plucking a particular part or parts out of that other string. \n",
+    "The most powerful and flexible way to extract information from strings like this is to use a *regular expression*, also known as a *regex*. A regular expression is a special string, written in the regular expression language, which specifies a general rule for deciding if another string passes a test (i.e., \"matches\" the regular expression), and also possibly for plucking a particular part or parts out of that other string. \n",
     "\n",
     "In this case, we need a regular expressin that extracts the pet breed from the file name.\n",
     "\n",