Update README.md

README.md

@@ -12,7 +12,7 @@ The data we released is divided into three domains: mobile, desktop and web.
 
 All annotation data is stored in JSON format and each sample contains:
 * `img_filename`: the interface screenshot file
-* `instruction`: human instruction
+* `instruction`: human instruction or referring expression extracted from ally tree or html
 * `bbox`: the bounding box of the target element corresponding to instruction
 
 Some data also contains a `data_type`, which records the type of an element in its structured information, if it can be obtained.
@@ -143,8 +143,15 @@ The annotation data is stored in
 
 - `fineweb_3m.json`
 
+***
+
+### Best practices
+
+
 *** 
 
+**The following are the open-source datasets we used as data sources. We welcome everyone to check the details and cite these sources accordingly！**
+
 [1] [AMEX: Android Multi-annotation Expo Dataset for Mobile GUI Agents](https://arxiv.org/abs/2407.17490)
 
 [2] [UIBert: Learning Generic Multimodal Representations for UI Understanding](https://arxiv.org/abs/2107.13731)