diff --git a/PR_DESCRIPTION.md b/PR_DESCRIPTION.md
new file mode 100644
index 00000000..156b7fa0
--- /dev/null
+++ b/PR_DESCRIPTION.md
@@ -0,0 +1,36 @@
+# PR Description: Advanced Ontology Extraction & Notebook Fixes
+
+## 🚀 Summary
+This PR revamps the `12_Unstructured_to_Ontology.ipynb` cookbook to resolve critical `TypeError` issues and significantly enhances the educational value of the ontology extraction guide. It also includes documentation updates and minor fixes across the context engineering module.
+
+## 🐛 Fixes & Improvements
+
+### 1. Fix: `TypeError: 'Entity' object is not subscriptable`
+- **Issue**: The original notebook attempted to access `Entity` and `Relation` objects using dictionary syntax (e.g., `e['text']`), causing runtime errors because these are implemented as Python `dataclasses`.
+- **Resolution**: Updated all access patterns to use dot notation (e.g., `e.text`) and added explicit `to_dict()` conversion logic before passing data to `OntologyGenerator`.
+
+### 2. Feature: Enhanced Ontology Pipeline Guide
+- **Classical NLP Pipeline**: detailed breakdown of using `NERExtractor` and `RelationExtractor` with proper object handling.
+- **Generative AI Pipeline**: Added a robust example using `LLMOntologyGenerator` for direct schema generation from text.
+- **Visualization**: Integrated `OntologyVisualizer` to compare outputs from both pipelines side-by-side.
+- **Export**: Added steps to export the generated ontology to OWL/Turtle format (`.ttl`).
+
+### 3. Documentation & Cleanup
+- **`10_Temporal_Knowledge_Graphs.ipynb`**: Cleaned up dependencies (removed Docker setup in favor of `pip install semantica`).
+- **`docs/reference/context.md`**: Fixed duplicate entries and added documentation for the production Graph Store.
+- **`semantica/graph_store/graph_store.py`**: Fixed a `NameError` (missing `Tuple` import).
+
+## 🛠️ Key Changes
+- `cookbook/advanced/12_Unstructured_to_Ontology.ipynb`: **Complete Rewrite**
+- `cookbook/advanced/10_Temporal_Knowledge_Graphs.ipynb`: **Updated**
+- `docs/reference/context.md`: **Updated**
+- `semantica/graph_store/graph_store.py`: **Fixed**
+
+## ✅ Verification
+- Validated that `NERExtractor` returns `Entity` objects and they are correctly processed.
+- Verified that `OntologyGenerator` receives correctly formatted dictionaries.
+- Ensured the notebook runs end-to-end without syntax errors.
+
+## 📦 Dependencies
+- No new external dependencies.
+- Relies on existing `semantica` package structure.
diff --git a/cookbook/advanced/Advanced_Triplet_Store.ipynb b/cookbook/advanced/Advanced_Triplet_Store.ipynb
deleted file mode 100644
index e00a4f1c..00000000
--- a/cookbook/advanced/Advanced_Triplet_Store.ipynb
+++ /dev/null
@@ -1,173 +0,0 @@
-{
- "cells": [
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "# Advanced Triplet Store Guide\n",
-    "\n",
-    "This guide explores the advanced capabilities of the Semantica Triplet Store module, focusing on RDF data management, SPARQL querying, and multi-backend support (Blazegraph, Jena, RDF4J).\n",
-    "\n",
-    "## Key Features\n",
-    "- Unified interface for Blazegraph, Jena, and RDF4J\n",
-    "- Bulk loading with progress tracking\n",
-    "- SPARQL query execution and optimization\n",
-    "- Transaction support (backend-dependent)"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "from semantica.triplet_store import TripletStore\n",
-    "from semantica.semantic_extract.triplet_extractor import Triplet"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## 1. Initialization\n",
-    "\n",
-    "Initialize the Triplet Store with your preferred backend."
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# Initialize Blazegraph store\n",
-    "store = TripletStore(\n",
-    "    backend=\"blazegraph\",\n",
-    "    endpoint=\"http://localhost:9999/blazegraph\"\n",
-    ")\n",
-    "\n",
-    "# Or Jena\n",
-    "# store = TripletStore(backend=\"jena\", endpoint=\"http://localhost:3030/ds\")\n",
-    "\n",
-    "# Or RDF4J\n",
-    "# store = TripletStore(backend=\"rdf4j\", endpoint=\"http://localhost:8080/rdf4j-server/repositories/myrepo\")"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## 2. Adding Triplets\n",
-    "\n",
-    "Add individual triplets or batch load them."
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# Single triplet\n",
-    "triplet = Triplet(\n",
-    "    subject=\"http://example.org/Alice\",\n",
-    "    predicate=\"http://xmlns.com/foaf/0.1/knows\",\n",
-    "    object=\"http://example.org/Bob\"\n",
-    ")\n",
-    "\n",
-    "store.add_triplet(triplet)\n",
-    "\n",
-    "# Bulk load\n",
-    "triplets = [\n",
-    "    Triplet(\n",
-    "        subject=\"http://example.org/Bob\",\n",
-    "        predicate=\"http://xmlns.com/foaf/0.1/knows\",\n",
-    "        object=\"http://example.org/Charlie\"\n",
-    "    ),\n",
-    "    Triplet(\n",
-    "        subject=\"http://example.org/Charlie\",\n",
-    "        predicate=\"http://xmlns.com/foaf/0.1/knows\",\n",
-    "        object=\"http://example.org/Alice\"\n",
-    "    )\n",
-    "]\n",
-    "\n",
-    "result = store.add_triplets(triplets, batch_size=100)"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## 3. SPARQL Querying\n",
-    "\n",
-    "Execute SPARQL queries to retrieve data."
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "query = \"\"\"\n",
-    "SELECT ?s ?p ?o\n",
-    "WHERE {\n",
-    "  ?s ?p ?o\n",
-    "}\n",
-    "LIMIT 10\n",
-    "\"\"\"\n",
-    "\n",
-    "results = store.execute_query(query)\n",
-    "for result in results.get(\"results\", {}).get(\"bindings\", []):\n",
-    "    print(result)"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## 4. Deleting and Updating\n",
-    "\n",
-    "Manage triplet lifecycle."
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "store.delete_triplet(triplet)\n",
-    "\n",
-    "# Update is delete + add\n",
-    "new_triplet = Triplet(\n",
-    "    subject=\"http://example.org/Alice\",\n",
-    "    predicate=\"http://xmlns.com/foaf/0.1/knows\",\n",
-    "    object=\"http://example.org/David\"\n",
-    ")\n",
-    "store.update_triplet(triplet, new_triplet)"
-   ]
-  }
- ],
- "metadata": {
-  "kernelspec": {
-   "display_name": "Python 3",
-   "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": "3.8.5"
-  }
- },
- "nbformat": 4,
- "nbformat_minor": 4
-}
diff --git a/cookbook/introduction/20_Triplet_Store.ipynb b/cookbook/introduction/20_Triplet_Store.ipynb
index 4390d648..350fcaa3 100644
--- a/cookbook/introduction/20_Triplet_Store.ipynb
+++ b/cookbook/introduction/20_Triplet_Store.ipynb
@@ -223,7 +223,7 @@
    "source": [
     "## Next Steps\n",
     "\n",
-    "Check out the **Advanced Triplet Store** guide in the `cookbook/advanced` folder for more complex operations like bulk loading optimization, transactions, and advanced SPARQL features."
+    "Check out the **Advanced Triplet Store** guide in the `cookbook/advanced` folder ([13_Advanced_Triplet_Store.ipynb](../advanced/13_Advanced_Triplet_Store.ipynb)) for more complex operations like bulk loading optimization, transactions, and advanced SPARQL features."
    ]
   }
  ],