Update README.md

README.md

@@ -123,7 +123,7 @@ A typical data point comprises a tokenized sentence, tags for each token, and a
 Tags are assigned an id number according to the index of its label as listed in:
 
 ```python
->>> dataset['train'].features[f"tags"].feature.names
+>>> dataset['train'].features['tags'].feature.names
 ```
 
 ### Data Fields