add label for radio buttons

app.py

@@ -55,7 +55,7 @@ def find_orgs(sentence, choice):
 example = """
 My latest exclusive for The Hill : Conservative frustration over Republican efforts to force a House vote on reauthorizing the Export - Import Bank boiled over Wednesday during a contentious GOP meeting.
 """
-radio_btn = gr.Radio(choices=['GPT', 'iSemantics'], value='iSemantics')
+radio_btn = gr.Radio(choices=['GPT', 'iSemantics'], value='iSemantics', label='Available models')
 textbox = gr.Textbox(label="Enter your text", placeholder="", lines=4)
 
 iface = gr.Interface(fn=find_orgs, inputs=[textbox, radio_btn], outputs="text",  examples=[[example]])