Update app.py

app.py

@@ -6,9 +6,10 @@ st.sidebar.title('Navigation')
 menu = st.sidebar.radio("", options=["Introduction", "Parsing NLU data into SQuAD 2.0", "Generating Questions", "Training",
                                      "Evaluation"], index=0)
 
-st.markdown('''
 
-## Question Answering NLU
+if menu == "Introduction":
+
+    st.markdown('''
 
 Question Answering NLU (QANLU) is an approach that maps the NLU task into question answering, 
 leveraging pre-trained question-answering models to perform well on few-shot settings. Instead of