add examples

app.py

@@ -115,7 +115,7 @@ inputs = [gr.Textbox(lines=5, label="Heavy chain"),
 ]
 iface = gr.Interface(fn=pred_seq, 
                      inputs=inputs, 
-                     examples = [h_chain_example, l_chain_example],
+                     examples = [[h_chain_example, l_chain_example]],
                      outputs=gr.HTML(),
                      title="Antibody structure prediction")