Update README.md

README.md

@@ -34,6 +34,8 @@ In mid-2023, our DeepReport system underwent a major update, encompassing both d
 | Chemistry             | 565,307   | 13,858  | 231,062      | 108,637   | 286,593              |
 | **Total**             | 5,342,566 | 206,462 | 2,591,591    | 1,362,922 | 2,941,942            |
 
+Note that each file is a list in the form of [[$c_1$, $c_2$, $p$, $p_1$, $p_2$], ...], the element of which is a quintuple. $c_1$ and $c_2$ are concepts, $p$ is the target texts, i.e., the verbalized ideas.
+
 Download with git
 
 ```bash