Question: "Fat Man and Little Boy" is the fifth episode of which sixteenth season that began on Sunday, November 7, 2004 and contained 21 episodes, beginning with Treehouse of Horror XV? 
Sentence (from "List of The Simpsons Treehouse of Horror episodes"): Starting with season fifteen's "Treehouse of Horror XIV", only one writer was credited as having written a "Treehouse of Horror" episode, and the trend has continued since.
Relevant evidence: No