Complex sentence: "Bloodletting" is the second episode of the second season of the post-apocalyptic horror television series "The Walking Dead", which aired on AMC in the United States on October 23,2011.
Split into simpler sentences: Bloodletting is the second episode of the second season of the post-apocalyptic horror television series "The Walking Dead". It initially aired on AMC in the United States on October 23,2011.