diff --git a/docs/tutorial/Search-FullOverview.ipynb b/docs/tutorial/Search-FullOverview.ipynb
index c15f471..09f33f8 100644
--- a/docs/tutorial/Search-FullOverview.ipynb
+++ b/docs/tutorial/Search-FullOverview.ipynb
@@ -413,7 +413,7 @@
     "\n",
     "event_ids = set()\n",
     "for attr in attributes:\n",
-    "    event_ids.add(event_id)\n",
+    "    event_ids.add(attr.event_id)\n",
     "\n",
     "# Fetch all related events\n",
     "for event_id in event_ids:\n",