Hi Licheng, thank you for your work.

It seems like all download links are not working since a few days ago, could you check and update the links? Thank you!

such as:

https://bvisionweb1.cs.unc.edu/licheng/referit/data/refclef.zip
https://bvisionweb1.cs.unc.edu/licheng/referit/data/refcoco.zip
https://bvisionweb1.cs.unc.edu/licheng/referit/data/refcoco+.zip
https://bvisionweb1.cs.unc.edu/licheng/referit/data/refcocog.zip