Update app.py

app.py

@@ -13,6 +13,9 @@ from nltk.tokenize import sent_tokenize
 from sentence_transformers import SentenceTransformer, util
 from transformers import AutoTokenizer, AutoModelForCausalLM, pipeline
 
+
+nltk.download('punkt')
+
 # --- Ensure punkt tokenizer is available ---
 try:
     nltk.data.find("tokenizers/punkt")