Update app.py

app.py

@@ -16,6 +16,7 @@ from langchain_groq import ChatGroq
 from langchain_core.output_parsers import StrOutputParser
 from langchain_core.prompts import ChatPromptTemplate
 from transformers import pipeline
+from nltk.tokenize import sent_tokenize
 from rake_nltk import Rake
 
 # Load environment variables
@@ -35,6 +36,7 @@ llm = ChatGroq(temperature=0.5, groq_api_key=GROQ_API_KEY, model_name="llama3-8b
 
 # Download required NLTK resources
 nltk.download("punkt")
+nltk.download("punkt_tab")
 nltk.download("stopwords")
 
 # Tone categories for fallback method