diff --git a/context/data.json b/context/data.json
index 2cda2392..10aa3577 100644
--- a/context/data.json
+++ b/context/data.json
@@ -1149,8 +1149,10 @@
       "sh": "http://www.w3.org/ns/shacl#",
       "shsh": "http://www.w3.org/ns/shacl-shacl#",
       "size": {
-        "@id": "schema:size"
-      },
+      "@id": "schema:size",
+      "@type": "xsd:integer"
+      }
+
       "skos": "http://www.w3.org/2004/02/skos/core#",
       "sku": {
         "@id": "schema:sku"
diff --git a/notebooks/query_minds_data.ipynb b/notebooks/query_minds_data.ipynb
new file mode 100644
index 00000000..9ad9bcde
--- /dev/null
+++ b/notebooks/query_minds_data.ipynb
@@ -0,0 +1,85 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "dd530794",
+   "metadata": {},
+   "source": [
+    "# Querying MINDS Data with SPARQL (Mock)\n",
+    "\n",
+    "This notebook demonstrates how to query MINDS data using Python.\n",
+    "For now, it uses a small mock dataset to show the workflow.\n",
+    "When a public SPARQL endpoint is available, replace the mock\n",
+    "data with the actual query results.\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "513c09b0",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "     neuron  size\n",
+      "0  Neuron_1   120\n",
+      "1  Neuron_2   150\n",
+      "2  Neuron_3   100\n"
+     ]
+    }
+   ],
+   "source": [
+    "import pandas as pd\n",
+    "\n",
+    "# Mock dataset for demonstration\n",
+    "data = [\n",
+    "    {\"neuron\": \"Neuron_1\", \"size\": 120},\n",
+    "    {\"neuron\": \"Neuron_2\", \"size\": 150},\n",
+    "    {\"neuron\": \"Neuron_3\", \"size\": 100},\n",
+    "]\n",
+    "\n",
+    "# Convert to DataFrame and display\n",
+    "df = pd.DataFrame(data)\n",
+    "print(df)\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "51954529",
+   "metadata": {},
+   "source": [
+    "## How to replace with real SPARQL endpoint\n",
+    "\n",
+    "When the MINDS SPARQL endpoint is available:\n",
+    "\n",
+    "1. Install `SPARQLWrapper`:\n",
+    "\n",
+    "```python\n",
+    "!python -m pip install SPARQLWrapper\n"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.14.2"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}