>>8854442
There is none. If you're trying to still demystify >>8851468, then its not gonna be that easy. Besides 4chan stripping away metadata. You can just as easily remove metadata by running the pic through photoshop for touch ups, saving as a copy, changing image formats, some other online image hosts will remove it on upload etc.

You would need the original unaltered pic in any instance to scan for a chance at finding prompt info.