add example

app.py

@@ -37,5 +37,10 @@ def query(question):
         return "Could not perform request. Try another one"
 
 
-iface = gr.Interface(fn=query, inputs="text", outputs="text")
+iface = gr.Interface(
+    fn=query,
+    inputs="text",
+    outputs="text",
+    examples=[["What were the total emissions for 2022 for each category?"]],
+)
 iface.launch()