support for multi class task

[tanghuiyu]

we can see from your code and paper that your method can do a verry good job on the binary class text classification tasks.But if we need to solve a multi class issue,how can we promote your algorithom
and the code? Thank you~

[mesnilgr]

This is not my paper, I coded their approach and reproduce the results.
I recommend asking the authors if they explored the multi class setting.