The download links of the data Wiki-500K are showed on the following.
 - Manik's webpage (Version 1): https://drive.google.com/open?id=0B3lPMIHmG6vGRmEzVDVkNjBMR3c
 - AttentionXML's github (Version 2): https://drive.google.com/open?id=1bGEcCagh8zaDV0ZNGsgF0QtwjcAm0Afk
 - Pecos's webpage (Version 3): https://dn721801.ca.archive.org/0/items/pecos-dataset/xmc-base/wiki-500k.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),  
 - attentionxml_change_idx.py for shifting the indices for 0-based to 1-based, and
 - pecos_trans_to_svm.py for transforming the CSR sparse matrices into the LIBSVM format. 
