Update app.py

app.py

@@ -123,7 +123,7 @@ def deidentify_doc(llm, pdftext, maxtokens, temperature, top_probability):
 
     last_text_to_find = ' '.join(pdftext.split()[-2:])
     last_index = output.rfind(last_text_to_find)
-    if last_index != -1:
+    if last_index != -1 and last_index>(len(pdftext)/2):
         output = output[:last_index+len(last_text_to_find)].strip()
         
     return output