Update esp_sentence_bert.py

utilities_language_bert/esp_sentence_bert.py

@@ -214,6 +214,10 @@ class TASK:
     def inflect_distractors(self):
         inflected_distractors = []
         for distractor_lemma in self.distractors:
+            if distractor_lemma is None:
+                self.bad_target_word = True
+                self.inflected_distractors = None
+                continue
             if distractor_lemma.count('_') > 1:
                 if distractor_lemma.startswith('haber_'):
                     distractor_lemma = distractor_lemma.split('_')[-2]