Update README.md

README.md

@@ -9,4 +9,10 @@ language:
   - en
 datasets:
   format: csv
----
+---
+
+Format:
+
+| Unnamed: 0 | u             | i             | ts                 | label        | idx                    |
+| ---------- | ------------- | ------------- | ------------------ | ------------ | ---------------------- |
+| `idx-1`    | `source node` | `target node` | `interaction time` | `defalut: 0` | `from 1 to the #edges` |