No. But I can make an attempt.
The adventurers we're watching - by appearances, they're real people who have real histories in Korvosa, although no one I've yet found has been able to corroborate anything but the broadest strokes of those histories - no family, no friends. They formed their party sometime last night for the purpose of exploring the nooks and crannies of this Vault, and in the course of their exploration happened across a door to the Gantelope.
They did not, I believe, recognize this door for what it was.
Now, I am not Marcus Endrin to track a falcon on a cloudy day, but neither am I wholly blind: four adventurers entered the Gantelope. And four adventurers left.
The same four? Possibly. Probably. I'm not entirely sure.