Fix demo pipeline

app.py

@@ -6,12 +6,12 @@ st.title('GPT Detection Demo')
 
 # Add 4 options for 4 models
 option = st.sidebar.selectbox(
-    'Which model do you want to use?',
-        ('GPT-2', 'GPT-3', 'GPT-Neo', 'GPT-J')
+    'Which pipeline do you want to use?',
+        ('sentiment-analysis'),
 )
 
 
-pipe = pipeline('text-generation', model=option)
+pipe = pipeline(option)
 text = st.text_area('Enter text here', 'Type here')
 
 if st.button('Generate'):