 Let's say you're having a hard time finding the right person to mention. So for example, I'm trying to mention Dylan Yukim, but when I type out the name, none of these are my friend Dylan. So what do we do? Here's what we do. We go and find the right person on Facebook. And so I have found the right Dylan, the correct Dylan on Facebook, friend of mine. And then we take the username of that person, and then we go back to the post or the comment that we want to mention, and we put the username after the app. There we are. That is the correct mention as a result. So I hope this helps.