add nltk for Unstructured

app.py

@@ -2,6 +2,9 @@ import gradio as gr
 from tabs.arena_sxs import arena_sxs
 from tabs.leaderboard import leaderboard
 import os
+import nltk
+
+nltk.download('averaged_perceptron_tagger')
 
 os.system("apt-get update && apt-get install -y poppler-utils tesseract-ocr")