Thread:Balu.ur/@comment-25501845-20141005063607/@comment-25079450-20141005173750

I don't know which one. Either

https://www.khanacademy.org/profile/khanacademy

or

https://www.khanacademy.org/profile/alexnr

or

both

I think the second link is AlexNatalieRoodman's because address is @alexnr