The relevant information to answer the above question is: The series follows the exploits of "The Gang", a group of debauched, self-centered friends who run the Irish bar Paddy's Pub in South Philadelphia.is the reasoning for what question and answer pair?
Q: It's Always Sunny in Philadelphia is an American television sitcom that premiered on FX on August 4, 2005. It moved to FXX beginning with the ninth season and has remained there since. It was created by Rob McElhenney who developed it with Glenn Howerton. It is executive produced and primarily written by McElhenney, Howerton, and Charlie Day, all of whom star alongside Kaitlin Olson and Danny DeVito. The series follows the exploits of "The Gang", a group of debauched, self-centered friends who run the Irish bar Paddy's Pub in South Philadelphia.

Based on this passage, where does it always sunny in philadelphia take place?
A: South Philadelphia