It took like... FAR more effort than it should have for me to get it.
86, slang, as in something you might tell your buddies like: "Oh I they 86'd from the bar last night because they were wasted"
86, as in, getting kicked out. See: https://www.urbandictionary.com/define.php?term=86
Then, "47", as in, the 47th president.
However, its only now I'm learning about its use to refer to a grave. I've never heard that before. I've only heard the usage as a verb/ adverb "to get 86'd"