Fixes concurrency issues when extracting files after download has ended

cf. [huggingface/datasets#4661](https://github.com/huggingface/datasets/issues/4661#issuecomment-2792885416)

MANTRAGSC.py

@@ -25,6 +25,7 @@ import xmltodict
 import numpy as np
 
 import datasets
+from filelock import FileLock
 
 _CITATION = """\
 @article{10.1093/jamia/ocv037,
@@ -149,7 +150,10 @@ class MANTRAGSC(datasets.GeneratorBasedBuilder):
 
 		language, dataset_type = self.config.name.split("_")
 
-		data_dir = dl_manager.download_and_extract(_URL)
+        # Fixes concurrency issues when extracting files after download has ended
+        # cf. https://github.com/huggingface/datasets/issues/4661#issuecomment-2792885416
+        with FileLock(Path(datasets.config.HF_CACHE_HOME) / "tmp_MANTRAGSC.lock"):
+    		data_dir = dl_manager.download_and_extract(_URL)
 		data_dir = Path(data_dir) / "GSC-v1.1" / f"{_DATASET_TYPES[dataset_type]}_GSC_{language}_man.xml"
 
 		return [