adds selectbox for first sentence

app.py

@@ -16,17 +16,25 @@ container_button = st.sidebar.container()
 mode = container_mode.radio(
     "Select your mode",
     ('Create Statistics', 'Play Storytelling'), index=0)
-story_till_now = st.text_input(
-    label='First Sentence',
-    value=random.choice([
-        'Hello, I\'m a language model,',
-        'So I suppose you want to ask me how I did it.',
-        'I always wanted to be a giraffe - until that night.',
-        'My first tutor was a dragon with a terrible sense of humor.',
-        'Doctors told her she could never diet again.',
-        'Memory is all around us, as well as within.',
+choices_first_sentence = [
+    'Custom',
+    'Hello, I\'m a language model,',
+    'So I suppose you want to ask me how I did it.',
+    'I always wanted to be a giraffe - until that night.',
+    'My first tutor was a dragon with a terrible sense of humor.',
+    'Doctors told her she could never diet again.',
+    'Memory is all around us, as well as within.',
+
+
+]
+cfs = st.selectbox('Choose First Sentence', choices_first_sentence)
+if cfs == 'Custom':
+    story_till_now = st.text_input(
+        label='First Sentence', key='first_sentence')
+else:
+    st.session_state.first_sentence = cfs
+    story_till_now = cfs
 
-    ]))
 
 num_generation = container_param.slider(
     label='Number of generation', min_value=1, max_value=100, value=5, step=1)
@@ -57,7 +65,7 @@ if mode == 'Create Statistics':
         #     st.plotly_chart(fig2, use_container_width=True)
         if len(gen.data) > 0:
             for si, story in enumerate(gen.data):
-                st.markdown(f'### Story no. {si}:', unsafe_allow_html=False)
+                st.markdown(f'### Story {si}:', unsafe_allow_html=False)
                 for i, sentence in enumerate(story):
                     col_turn, col_sentence, col_emo = st.columns([1, 8, 2])
                     col_turn.markdown(