Datasets links broken?

[zlj63501]

Hi,

Thank you for sharing this code. I find these links broken in downloading the refcoco dataset.

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

[zlj63501]

Other solution: lichengunc/refer#14