Fix dataset download url

crosssum.py

@@ -116,7 +116,9 @@ class Crosssum(datasets.GeneratorBasedBuilder):
     def _split_generators(self, dl_manager):
         """Returns SplitGenerators."""
         lang = str(self.config.name)
-        url = _URL.format(lang, self.VERSION.version_str[:-2])
+        src_lang, tgt_lang = lang.split("-")
+        # url = _URL.format(lang, self.VERSION.version_str[:-2])
+        url = _URL.format(src_lang, tgt_lang)
 
         data_dir = dl_manager.download_and_extract(url)
         return [