diff --git a/src/explore.ipynb b/src/explore.ipynb
index 9413ade80420875f4c66ad46f5975cd0d01d7c16..c820a0db6d1d5c5269b2a434f66774a7c05a2d9e 100644
--- a/src/explore.ipynb
+++ b/src/explore.ipynb
@@ -306,12 +306,14 @@
     "print (df.query('af_group!=\"default\"'))\n",
     "\n",
     "# --> so available groups are \"default\" and \"feedback\"\n",
-    "# TODO: question: what do they mean?"
+    "# TODO: question: what do they mean?\n",
+    "# From https://www.mediawiki.org/wiki/Extension:AbuseFilter/abuse_filter_table :\n",
+    "# \"The group this filter belongs to, as defined in $wgAbuseFilterValidGroups.\" still don't get it"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 43,
+   "execution_count": 5,
    "metadata": {},
    "outputs": [
     {