I am an instructor, how do I see WHO (which students) have liked a discussion reply?

[megharris]

I have a discussion topic where I am awarding various amounts of points for various activities like posting a relevant article, asking a question about class, commenting on somebody else's question/article, etc. So I would like to award points for liking another student's post but I am unable to see which students have liked the discussion replies. I have only been able to see how many students have liked the discussion post/reply.