change captioner funcion little bit

app.py

@@ -39,7 +39,7 @@ def image_to_base64_str(pil_image):
 def captioner(image):
     base64_image = image_to_base64_str(image)
     result = get_completion(base64_image)
-    return result
+    return result[0]['generated_text']
 
 # Interface
 gr.close_all()