I'm taking part in a tech quiz event happening in a while and a very frequent type of question is where several different items are showed and we're asked to name something that connects all of them, which is usually a company or some type of software/product. I thought an efficient way to take notes for it would be to store data as two-way connections between items, so if I opened something called "Microsoft", for example, It would show me a small description and things I've added which have a connection to Microsoft such as Skype\LinkedIn\GitHub, etc.
Surprisingly, I have not been able to find an app/service that can let me do this. Some apps like Evernote let you copy the internal link for a note and paste it in other notes, but that's not really a two-way link and I'm looking for something which places an emphasis on the connections between notes/items. I tried going ahead and spinning up something myself with ExpressJS and Vue, and although I ended up with something that "works", it wouldn't really be pleasant to use. Is there anything online that provides the functionality I'm looking for? Or is my best bet to stick with something like Evernote?