The download links of the data Amazon-3M are showed on the following.
 - Manik's webpage (Version 1): https://drive.google.com/file/d/1X9CzbgyB-x1dFbPSWUpkbKvKG9TrAU0y
 - Pecos's webpage (Version 2): https://dn721801.ca.archive.org/0/items/pecos-dataset/xmc-base/amazon-3m.tar.gz

After the decompression, we utilize the code
 - manik_change_idx.py for shifting the indices for 0-based to 1-based and removing the first row (which is the data statistic),  
 - pecos_trans_to_svm.py for transforming the CSR sparse matrices into the LIBSVM format. 
