Question: The Hamasa Shrine Temple Theater houses one of only two Robert Morton theatre organs, with the other at the Saenger Theater in a city primarily in Forrest County with a population at the 2010 census of what? 
Sentence (from "Hattiesburg, Mississippi"): Hattiesburg is a city in the U.S. state of Mississippi, primarily in Forrest County (where it is the county seat) and extending west into Lamar County.
Relevant evidence: Yes