added check for eligible models in 3d graph tab

app.py

@@ -202,13 +202,15 @@ elif active_tab == "3D graph":
     all_models_words = load_all_models_words()
     
     with st.container():
+        eligible_models = []
         with col1:
             word = st.multiselect("Enter a word", all_models_words, max_selections=1)
             if len(word) > 0:
                 word = word[0]
+                eligible_models = models_for_word_dict[word]
             
         with col2:
-            time_slice = st.selectbox("Time slice", ["Archaic", "Classical", "Hellenistic", "Early Roman", "Late Roman"])
+            time_slice = st.selectbox("Time slice", eligible_models)
 
         n = st.slider("Number of words", 1, 50, 15)