 So for us annotation does many things but mostly it really breaks down that language barrier because when you come across a word that's not intuitive. And you really, you know a lot of scientific words, you can't even really use context clues to find out, you know, what they mean. So we've done a ton of work with the annotations and just defining vocabulary words as a way to just encourage people to keep reading, you know this word might trip you up and you're going to stop but here's that definition. So keep going.