How to include a specific id out of array relationship?

Let’s say I want to get the comment id 5 included in the included section of article resource?

There might be other ways of modelling this I’m missing here.

Thanks in advance.

The included section is for related resources.

To better answer your question, tell us more about your use case. Why would you need to only include one comment with a particular ID? What’s the purpose of the request?