Question: How many acres is the district in Selma where  the most popular style of house in the Southern United States from the end of the American Civil War (1861–65) through the 1920s be found?
Sentence (from "Shotgun house"): Alternate names include "shotgun shack", "shotgun hut", "shotgun cottage", and in the case of a multihome dwelling, "shotgun apartment".
Relevant evidence: No