diff --git a/03_classification.ipynb b/03_classification.ipynb
index 1e7960a..b021d97 100644
--- a/03_classification.ipynb
+++ b/03_classification.ipynb
@@ -2281,7 +2281,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "It seems that the ham emails are more often plain text, while spam has quite a lot of HTML. Moreover, quite a few ham emails are signed using PGP, while no spam is. In short, it seems that the email structure is a usual information to have."
+    "It seems that the ham emails are more often plain text, while spam has quite a lot of HTML. Moreover, quite a few ham emails are signed using PGP, while no spam is. In short, it seems that the email structure is useful information to have."
    ]
   },
   {