Update app.py

app.py

@@ -14,6 +14,7 @@ def clean_text(text):
     text = re.sub(r"\n", " ", text)
     text = re.sub(r"\n\n", " ", text)
     text = re.sub(r"\t", " ", text)
+    text = re.sub(r"ADVERTISEMENT", " ", text)
     text = text.strip(" ")
     text = re.sub(
         " +", " ", text