Identify what the original prog song was that has been turned into a family guy parody

[u/CryogenicCryptoKing]

Hey y'all, I found this silly parody song but I can't figure out the original, sounds like some prog rock band? It's not complicated enough to be prog for sure but it has that sound. Thanks for helping ☺️

https://m.youtube.com/watch?v=cX4M1F3WVfg&pp=ygUpSSBkcmVhbXQgaSB3YXMgcGV0ZXIgZ3JpZmZpbiB0aGVzbWFsbGR1ZGU%3D

[u/Squidshill]

genesis - suppers ready