Fixed the nltk error

semf1.py

@@ -250,8 +250,9 @@ class SemF1(evaluate.Metric):
     def _download_and_prepare(self, dl_manager):
         """Optional: download external resources useful to compute the scores"""
         import nltk
-        if not nltk.data.find("tokenizers/punkt"):
-            nltk.download("punkt", quiet=True)
+        nltk.download("punkt", quiet=True)
+        # if not nltk.data.find("tokenizers/punkt"):
+
 
     def _compute(
             self,