Only run the pipeline if a question is specified

app.py

@@ -134,7 +134,7 @@ colors = ["#64A087", "green", "black"]
 
 
 def process_question(question, document, model=list(CHECKPOINTS.keys())[0]):
-    if document is None:
+    if not question or document is None:
         return None, None, None
 
     text_value = None