If I have a lot of question and answer pairs about one very specific topic, what is the best way to link them? Multiple Q/As in a note? An invisible field with the topic in it?

I often want to have many Q/A pairs for a specific topic (like say a specific historical event), but I've been using my tags to separate everything into different categories and don't want my tags to get cluttered with a bunch of hyper specific things. However, I do want all my notes about a specific thing to be connected somehow. I suppose I could use hierarchical tags so that I can browse the notes sidebar without it feeling cluttered? My first instinct is to make a note that can accept multiple questions and answers, which would make it easy to see and edit all of the different Q/A pairs at the same time, but that doesn't feel very atomic. I could make a field with the name of the thing, but it seems sort of annoying to have to type it out every time without autocomplete. What's the best way to do this? Thanks.