Update README.md

README.md

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 - art
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 # This is just a simple dataset about Nailong for learning purposes.
-You can upload annotations in COCO format using this annotation website [Label Stdio](https://label.stdio.run/).
+You can upload annotations in any format (e.g., COCO) using this annotation website(e.g.,[Label Stdio](https://label.stdio.run/)).
 
 **We welcome everyone to submit pull requests!**
 - Artificial Intelligence Learning Group:[949992679](https://qm.qq.com/q/6Pn6IyNle2)