Update NCR.py

NCR.py

@@ -101,7 +101,9 @@ class NCR(datasets.GeneratorBasedBuilder):
         def pure(sens):
             if sens.startswith('A') or sens.startswith('B') or sens.startswith('C') or sens.startswith('D'):
                 sens = sens[1:]
-            return sens.replace(".","").replace("．","").strip()
+            if sens.startswith('.') or sens.startswith('．'):
+                sens = sens[1:]
+            return sens.strip()
 
         with open(filepath, encoding="utf-8") as f:
             data = json.loads(f.read())