diff --git a/rdf/RDF.ipynb b/rdf/RDF.ipynb
index e4917af..beccd4c 100644
--- a/rdf/RDF.ipynb
+++ b/rdf/RDF.ipynb
@@ -318,45 +318,9 @@
     "\n",
     "```\n",
     "# YOUR ANSWER HERE\n",
-    "```"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {
-    "deletable": false,
-    "editable": false,
-    "nbgrader": {
-     "checksum": "61933311e76dd200b63032f42f26b11d",
-     "grade": false,
-     "grade_id": "cell-da88c2f8170436fe",
-     "locked": true,
-     "schema_version": 1,
-     "solution": false
-    }
-   },
-   "source": [
-    "Turtle is usually written in standalone files (e.g. `mydefinition.ttl`).\n",
-    "To write Turtle definitions inside our notebook, and to make it easy to test them, we will use a special magic command: `%%ttl`.\n",
-    "\n",
-    "To make sure everything works, let's try first with an example.\n",
-    "\n",
-    "\n",
-    "Copy/paste this solution below:\n",
-    "\n",
-    "```turtle\n",
-    "@prefix foaf: <http://xmlns.com/foaf/0.1/> .\n",
-    "@prefix geo: <http://www.w3.org/2003/01/geo/wgs84_pos#> .\n",
-    "@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .\n",
+    "```\n",
     "\n",
-    "<http://purl.org/net/bsletten> \n",
-    "    a foaf:Person;\n",
-    "    foaf:interest <http://www.w3.org/2000/01/sw/>;\n",
-    "    foaf:based_near [\n",
-    "        geo:lat \"34.0736111\" ;\n",
-    "        geo:lon \"-118.3994444\"\n",
-    "   ] .\n",
-    "```"
+    "Execute the following line. It simple fills 'example' with the code written below. It should produce the output 'File loaded!\"."
    ]
   },
   {
@@ -425,6 +389,76 @@
     "print('All tests passed. Well done!')"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Now replace #YOUR ANSWER HERE with your answer (the triples) and execute the test."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "%%ttl example\n",
+    "# YOUR ANSWER HERE"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# This code tests that the definition above is correct.\n",
+    "g = solution('example')\n",
+    "test('Some triples have been loaded',\n",
+    "     len(g))\n",
+    "test('A person has been defined',\n",
+    "     g.subjects(RDF.type, term.URIRef('http://xmlns.com/foaf/0.1/Person')))\n",
+    "print('All tests passed. Well done!')"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "deletable": false,
+    "editable": false,
+    "nbgrader": {
+     "checksum": "61933311e76dd200b63032f42f26b11d",
+     "grade": false,
+     "grade_id": "cell-da88c2f8170436fe",
+     "locked": true,
+     "schema_version": 1,
+     "solution": false
+    }
+   },
+   "source": [
+    "Turtle is usually written in standalone files (e.g. `mydefinition.ttl`).\n",
+    "To write Turtle definitions inside our notebook, and to make it easy to test them, we will use a special magic command: `%%ttl`.\n",
+    "\n",
+    "To make sure everything works, let's try first with an example.\n",
+    "\n",
+    "\n",
+    "Copy/paste this solution below:\n",
+    "\n",
+    "```turtle\n",
+    "@prefix foaf: <http://xmlns.com/foaf/0.1/> .\n",
+    "@prefix geo: <http://www.w3.org/2003/01/geo/wgs84_pos#> .\n",
+    "@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .\n",
+    "\n",
+    "<http://purl.org/net/bsletten> \n",
+    "    a foaf:Person;\n",
+    "    foaf:interest <http://www.w3.org/2000/01/sw/>;\n",
+    "    foaf:based_near [\n",
+    "        geo:lat \"34.0736111\" ;\n",
+    "        geo:lon \"-118.3994444\"\n",
+    "   ] .\n",
+    "```"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {
@@ -975,7 +1009,24 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.2"
+   "version": "3.5.5"
+  },
+  "latex_envs": {
+   "LaTeX_envs_menu_present": true,
+   "autocomplete": true,
+   "bibliofile": "biblio.bib",
+   "cite_by": "apalike",
+   "current_citInitial": 1,
+   "eqLabelWithNumbers": true,
+   "eqNumInitial": 1,
+   "hotkeys": {
+    "equation": "Ctrl-E",
+    "itemize": "Ctrl-I"
+   },
+   "labels_anchors": false,
+   "latex_user_defs": false,
+   "report_style_numbering": false,
+   "user_envs_cfg": false
   }
  },
  "nbformat": 4,