Update pmc_oa.py

pmc_oa.py

@@ -92,6 +92,8 @@ class PMC_OA(datasets.GeneratorBasedBuilder):
     def _split_generators(self, dl_manager):
         """Returns SplitGenerators."""
         downloaded_files = dl_manager.download_and_extract(_URLs)
+        raise RuntimeError(downloaded_files)
+
         if self.config.name == "pmc_oa_beta":
             return [
                 datasets.SplitGenerator(