Update app.py

app.py

@@ -22,7 +22,7 @@ def my_custom_tool(sentence:str)-> str: #it's import to specify the return type
 
     for token in doc:
     if token.dep_ in ("nsubj", "nsubjpass"):
-        return "Subject:", token.text
+        return f"Subject: {token.text}"
 
 
 @tool