Update app.py

app.py

@@ -29,7 +29,7 @@ def call(model_name, sentence, detection_threshold):
     def pretty_qas(pred_info) -> List[str]:
         if not pred_info or not pred_info['QAs']: return []
         return [f"{qa['question']} --- {';'.join(qa['answers'])}"
-                for qa in pred_info['QAs']]
+                for qa in pred_info['QAs'] if qa is not None]
     all_qas = [qa for pred_info in pred_infos for qa in pretty_qas(pred_info)]                      
     if not pred_infos:
         pretty_qa_output = "NO NOMINALIZATION FOUND"