I heard tale of a sentence which is odd but grammatically correct where every word is 가, but each 가 is a different part of speech. I'm also not sure if it's five or six 가s, but I would love to reconnect with this doozy.
I'm pretty sure I know the first two
가 (Mr. Ga)
가 (subject particle)
가 (place ?)
가 (verb for "goes")
I think I'm missing at least one if not two more of them...