diff --git a/lod/01_SPARQL_Introduction.ipynb b/lod/01_SPARQL_Introduction.ipynb
index 083c7e9..3a05c2e 100755
--- a/lod/01_SPARQL_Introduction.ipynb
+++ b/lod/01_SPARQL_Introduction.ipynb
@@ -48,7 +48,7 @@
     "This is the first in a series of notebooks about SPARQL, which consists of:\n",
     "\n",
     "* This notebook, which introduces basic concepts using a small public dataset.\n",
-    "* [A notebook with queries to a custom dataset](02_SPARQL_Custom_Endpoint.ipynb), which links to the RDF exercises.\n"
+    "* [A notebook with queries to a custom dataset](02_SPARQL_Custom_Endpoint.ipynb), which links to the RDF exercises and it is out of the scope of this laboratory. You can consult it if you are interested.\n"
    ]
   },
   {