diff --git a/rdf/RDF.ipynb b/rdf/RDF.ipynb
index 67803f0..df1f03b 100644
--- a/rdf/RDF.ipynb
+++ b/rdf/RDF.ipynb
@@ -115,7 +115,7 @@
     "\n",
     "Each of these, (`<subject>`, `<predicate>` and `<object>`) should be unique identifiers.\n",
     "\n",
-    "For example, to say Timmy is a 6 year-old whose dog is Tobby, we would write:\n",
+    "For example, to say Timmy is a 7 year-old whose dog is Tobby, we would write:\n",
     "\n",
     "```turtle\n",
     "<http://example.org/Timmy>  <http://example.org/hasDog> <http://example.org/Tobby>\n",