Update victorian_authorship.py

victorian_authorship.py

@@ -36,7 +36,7 @@ urls_per_split = {
 features_types_per_config = {
     "authorship": {
         "text": datasets.Value("string"),
-        "author": datasets.ClassLabel(num_classes=50)
+        "author": datasets.ClassLabel(num_classes=51)
     }
 }
 features_per_config = {k: datasets.Features(features_types_per_config[k]) for k in features_types_per_config}