Thanks devnikhilmishra for bringing the corrupted data files to our attention. If any of you downloaded the datasets within the 1st hour of the hackathon, please download the new files. The new versions don't have the '+AC-' noise. The new file names end in 'v2'.
@ZINDI, happy to help :)
Thank you @ZINDI
but it seems like the variable description csv is still having the +AC- noice, please check
We have just updated that.