I can not extract *.tar.gz file

[lailoo]

this is a problem which I encounter:
tar -zxvf conll2012_model.tar.gz

gzip: stdin: not in gzip format
tar: Child returned status 1
tar: Error is not recoverable: exiting now

This problem is really confuse me, I would appreciate if someone help me.

[SiyuWang15]

The files in directory ./resources is not really a zip file in fact, you must download the correct files here https://drive.google.com/drive/folders/0B5zHXdvxrsjNZUx2YXJ5cEM0TW8?usp=sharing

[moadqassem]

After downloading it from the google drive it, the extraction works as expected.