Fix yielding

itacola.py

@@ -139,8 +139,7 @@ class ItaCola(datasets.GeneratorBasedBuilder):
                 fields = row.strip().split("\t")
                 if len(fields) > 5:
                     fields, ex_split = fields[:-1], fields[-1]
-                    if ex_split.strip() != split:
-                        continue
-                yield id_, {
-                    k:v.strip() for k,v in zip(features, fields)
-                }
+                if ex_split is None or ex_split.strip() == split:
+                    yield id_, {
+                        k:v.strip() for k,v in zip(features, fields)
+                    }