update explain config

README.md

@@ -33,7 +33,7 @@ cd eflwr/Run
 ## Running the tests
 
 ### Step 1. Configure
-Configure the information of each exp in `config_instance*.json`, you can add more `config_instance*.json` with * is a number. Use your editor instead of *vim* (*nano* etc).
+Configure the information of each exp in `config_instance*.json`, you can add more `config_instance*.json` with * is a number. Use your editor instead of *vim* (*nano* etc). See the examples in 2 config files which provied in Run directory.
 ```bash
 vim config_instance1.json
 ```