Graphcomment has its own short-link system.
It allows to share a short url (example: http://yak.li/xyz) any succession of comments in the tree of the discussions.
By opening a Yak.li address in a browser, we find exactly the conversation you selected when you created the link by clicking « share ».
We named it Yak.li, it was inspired by the phrase « to yak » in slang English meaning something like « babbling ».