fix, import from nala Rostlab/nalaf#155

Author: juanmirocks

scripts/get_corpus_stats.py

@@ -2,7 +2,7 @@
 
 from nala.preprocessing.definers import ExclusiveNLDefiner
 from nala.utils.corpora import get_corpus, ALL_CORPORA
-from nalaf.utils import MUT_CLASS_ID
+from nala.utils import MUT_CLASS_ID
 from nalaf.structures.dataset_pipelines import PrepareDatasetPipeline
 from nalaf.structures.data import Dataset
 from collections import Counter