Update README.md

README.md

@@ -14,7 +14,7 @@ This is the official code for **HistRED: A Historical Document-Level Relation Ex
 Note that this dataset is open under [CC BY-NC-ND 4.0](https://creativecommons.org/licenses/by-nc-nd/4.0/) license.
 
 # Dataset Example
-![image](fig_example.pdf)
+![image](example.png)
 
 
 # Corpus of HistRED: \<\< Yeonhaengnok \>\>