diff --git a/examples/4.using_pretrained_classifier.py b/examples/4.using_pretrained_classifier.py
index 710048d..5b5ead5 100644
--- a/examples/4.using_pretrained_classifier.py
+++ b/examples/4.using_pretrained_classifier.py
@@ -14,7 +14,7 @@ import numpy as np
 import quapy.functional as F
 
 
-# A scikit-learn's style wrapper for a huggingface-based pre-trained transformer
+# A scikit-learn's style wrapper for a huggingface-based pre-trained transformer for binary sentiment classification
 class HFTextClassifier(BaseEstimator, ClassifierMixin):
     def __init__(self, model_name='distilbert-base-uncased-finetuned-sst-2-english'):
         self.pipe = pipeline("sentiment-analysis", model=model_name)