improved dataset card

README.md

@@ -82,6 +82,12 @@ task_categories:
 
 This dataset contains large text resources (~133GB in total) from mc4 filtered for legal data that can be used for pretraining language models.
 
+Use the dataset like this:
+```python
+from datasets import load_dataset
+dataset = load_dataset("joelito/mc4_legal", "de", split='train', streaming=True)
+```
+
 ### Supported Tasks and Leaderboards
 
 The dataset supports the task of masked language modeling.