Update README.md

README.md

@@ -25,7 +25,7 @@ In this section, we will provide a detailed introduction to evaluation metrics.
 
 To evaluate the retrieval performance, we consider the following metrics:
 
-- **Context Recall** uses LLMs to evaluate whether the retrieved documents contain all the relevant information required for answer generation.
+- **Context Recall** uses LLMs to evaluate whether the retrieved documents contain all the relevant textual information required for answer generation.
 - **Visual Recall** measures the percentage of retrieved images relative to the total number of images in the ground truth.  
   It is computed as: