update readme

README.md

@@ -80,4 +80,12 @@ The results with selective prediction are presented in the following tables. The
 |gpt-4o-mini | 0.0154 | 0.0154  | 0.0154   |
 |falcon3-7b-instruct | 0.0087| 0.0087  | 0.0087  |
 
+this tables show the performance of the LLMs for the SP score by considering the fact that the LLMs can say "I don't know" when they do not know the answer.
+
+|          | SP        |
+|----------|-----------|
+|Mistral| 0.252     |
+|gpt-4o-mini | 0.270 |
+|falcon3-7b-instruct | 0.456 |
+
 \section{Citation}