Add comment on biased models

16_nlp_with_rnns_and_attention.ipynb

@@ -2666,6 +2666,13 @@
     "result = classifier(\"The actors were very convincing.\")"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Models can be very biased. For example, it may like or dislike some countries depending on the data it was trained on, and how it is used, so use it with care:"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 90,