I have a technical question & answers discussion forum on UNA and I would like, in the future, to use questions and answers to train a Q&A AI bot. To do this, I need a way to programmatically identify the best answer to each question, and the number of votes seem like a good approach.

UNA discussions have an Up/Down vote feature for the whole discussion (assumed to be linked to the first post), but it seems that the answers (or comments) only have the "like" button.

How can I enable Up/Down votes for discussions replies/comments ?