diff --git a/sphinx/index.rst b/sphinx/index.rst
index dd5bd3e..9c10aee 100644
--- a/sphinx/index.rst
+++ b/sphinx/index.rst
@@ -12,11 +12,13 @@
 Electrochemistry Ontology
 ================================
 
-Welcome to the **EMMO Electrochemistry Domain Ontology**, a semantic resource with essential terms and relationships to describe electrochemical systems, materials, methods, and data.
+Welcome to the **EMMO Electrochemistry Domain Ontology**, a semantic resource with essential terms and relationships to describe electrochemical systems, materials, methods, and data. **Here's a simple example:**
 
-Here's a simple example
------------------------
-.. code-block:: json
+.. tab-set::
+
+   .. tab-item:: JSON
+
+      .. code-block:: json
          :linenos:
 
          {
@@ -33,6 +35,17 @@ Here's a simple example
             }
          }
 
+   .. tab-item:: JSON-LD Playground
+
+      .. raw:: html
+         
+         <div style="position: relative; padding-top: 56.25%; height: 0;">
+            <iframe src="https://json-ld.org/playground/#startTab=tab-table&json-ld=%7B%22%40context%22%3A%22https%3A%2F%2Fraw.githubusercontent.com%2Femmo-repo%2Fdomain-electrochemistry%2Fmaster%2Fcontext.json%22%2C%22%40type%22%3A%22ElectrochemicalCell%22%2C%22hasNegativeElectrode%22%3A%7B%22%40type%22%3A%22ZincElectrode%22%7D%2C%22hasPositiveElectrode%22%3A%7B%22%40type%22%3A%22ManganeseDioxideElectrode%22%7D%2C%22hasElectrolyte%22%3A%7B%22%40type%22%3A%22AlkalineElectrolyte%22%7D%7D" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%;" frameborder="0" allowfullscreen></iframe>
+         </div>
+
+
+Still interested? Check this out
+--------------------------------
 .. grid::
 
     .. grid-item-card::