nltk fix

title_generator.py

@@ -1,6 +1,8 @@
 import pandas as pd
 import re
+import nltk
 from nltk.corpus import stopwords
+nltk.download('stopwords')
 from gensim.parsing import preprocess_string, strip_tags, strip_numeric, strip_multiple_whitespaces, stem_text, strip_punctuation, remove_stopwords
 import spacy
 import torch