Q:

Tagging/Mentioning Friends in Comments via Graph Api

How could I mention friends in comment via Graph Api, as I know Open Graph
let us to tag ,if we  create some actions/objects or use already predefined actions. 
My case is different , I would like to let users tag friends in a simple comment. They don't do anything related to an object or action and that is why I don't need to use Open Graph. 
Please any solution? 

A:

First thing, without Open Graph you can forget the word tag using the graph API.  You have to have use the OG for tagging. 
Second thing, even by using OG you can not tag in a comment.  When you publish a story using OG, you can tag frieds/places.  But on comments, you can not tag anything using Graph API/OG. 