upd: corrected split mapper

rwth_phoenix_weather_2014.py

@@ -91,7 +91,7 @@ class RWTHPhoenixWeather2014(datasets.GeneratorBasedBuilder):
 
         dataDirMapper = {
             datasets.Split.TRAIN: "train",
-            datasets.Split.VALIDATION: "val",
+            datasets.Split.VALIDATION: "dev",
             datasets.Split.TEST: "test",
         }