Add "How are Faithfulness and Factuality calculated?" to FAQ

src/display/about.py

@@ -117,12 +117,19 @@ If there is no icon, we have not uploaded the information on the model yet, feel
 FAQ_TEXT = """
 ---------------------------
 # FAQ
-## 1) Submitting a model
+## Submitting a model
 XXX
-## 2) Model results
+
+## Model results
 XXX
-## 3) Editing a submission
+
+## Editing a submission
 XXX
+
+## How are Faithfulness and Factuality calculated?
+We classify each task into Faithfulness and Factuality tasks based on their characteristics, and calculate the Faithfulness and Factuality scores by **averaging the evaluation metrics for tasks within each category**.
+We are also planning to try normalising the score for each task before averaging.
+Detailed information such as how we classified the tasks and more can be found in <a href="https://arxiv.org/abs/2404.05904" target="_blank">our paper</a>.
 """
 
 EVALUATION_QUEUE_TEXT = """