update README.md

README.md

@@ -59,6 +59,17 @@ are Web pages from Common Crawl in Chinese, Persian, and Russian.
  - `text`: extracted article body
  - `url`: source URL
 
+## Dataset Usage
+
+```python
+from datasets import load_dataset
+
+dataset = load_dataset('neuclir/hc4')
+dataset['fas'] # Persian documents
+dataset['rus'] # Russian documents
+dataset['zho'] # Chinese documents
+```
+
 ### Citation Information
 
 ```