Many, many ways to ID something. Tags, Interface Queries, custom IDs. But perhaps all you need is to compare the class if you’re looking for chairs only:
Compare the hit result to all known
references of the actor your trying to
get a hit result for using a “Get all
actors of class” node and a “For each
loop” node.
I’d avoid this at any cost. Slowest, the most inefficient, ham-fisted brute force method 
Last resort only. I’ve yet to run into a situation where this would be needed.
A tag system can be made neat:
Also works with components for that extra granularity but does require a bit of upfront setup. Like everything else that works.