add link to source from webretriever

app.py

@@ -52,4 +52,7 @@ if st.session_state.get('query') and run_pressed:
         src = answers_2['invocation_context']['documents'][0].content.replace("$", "\$")
         split_marker = "\n\n" if "\n\n" in src else "\n"
         src = " ".join(src.split(split_marker))[0:2000] + "..."
+        if answers_2['invocation_context']['documents'][0].meta.get('link'):
+            title = answers_2['invocation_context']['documents'][0].meta.get('link')
+            src = '"' + title + '": ' + src
         st.write(src)