better description

app.py

@@ -70,7 +70,7 @@ results = [result["_source"] for result in results["hits"]["hits"]]
 documents = {f"{result['title']} - {result['author']}": result['id'] for result in results}
 
 st.sidebar.title("Semantic compare")
-st.sidebar.write("Select 2 or more documents from the SERICA library to semantically compare them")
+st.sidebar.write("Select documents from the SERICA library to semantically compare them. Hover above the data points to see the respective sentences")
 multiselect = st.sidebar.multiselect("Documents", list(documents.keys()))
 model = st.sidebar.selectbox("Model", ["LaBSE"])
 limit = st.sidebar.number_input("Sentences per document", 1000)