Update app.py

app.py

@@ -1,6 +1,8 @@
 from fastapi.middleware.cors import CORSMiddleware
 import json
 import torch
+import nltk
+nltk.download("punkt")
 from transformers import BertTokenizerFast, BertTokenizer, BertForTokenClassification, BertForSequenceClassification, Pipeline
 from nltk import sent_tokenize
 import uvicorn